Touch panel and liquid crystal display comprising the same

Patent metadata

Field	Value
Publication number	US-9639188-B2
Application number	US-201214342485-A
Country	US
Kind code	B2
Filing date	Aug 31, 2012
Priority date	Sep 1, 2011
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

A touch panel according to the embodiment includes a substrate, a recess part on the substrate, an electrode unit aligned on the substrate to detect an input position and an actuator aligned on the recess part to transfer vibration force. A liquid crystal display according to the embodiment includes a liquid crystal panel for displaying images; and a touch panel aligned at a display side of the liquid crystal panel such that information is input thereto from an outside. The touch panel includes an input unit for inputting the information; and a haptic unit for applying vibration. The input unit includes a first substrate; a sensor unit aligned on the first substrate to detect an input position; and a wiring electrically connected to the sensor unit. The haptic unit includes a second substrate on the first substrate; a recess part on one surface of the second substrate; an electrode unit aligned on the second substrate to receive position information; and an actuator aligned on the recess part to transfer vibration force.

First claim

The invention claimed is:

1. A touch panel comprising an active area for detecting position of an input and a dummy area disposed around the active area, the touch panel further comprising:
an input unit for inputting information; and
a haptic unit positioned on the input unit to apply vibration,
wherein the input unit comprises:
a first substrate;
a sensor unit for detecting an input position on the first substrate; and
a wiring electrically connected to the sensor unit;
wherein the haptic unit comprises:
a second substrate on the first substrate;
a recess part on one surface of the second substrate;
an electrode unit aligned on the second substrate to receive position information; and
an actuator aligned on the recess part to transfer vibration force;
wherein the second substrate comprises a first thickness and a second thickness in the active area,
wherein the first thickness corresponds to a thickness of the second substrate in the dummy area,
wherein the second thickness corresponds to a thickness excluding a depth of the recess part from the first thickness,
wherein the first thickness is greater than the second thickness,
wherein the recess part has a concave structure,
wherein the actuator is disposed in the concave structure of the active area, and
wherein the actuator is transparent.

2. The touch panel of claim 1 , wherein the electrode unit includes a first electrode unit extending in a first direction and a second electrode unit extending in a second direction.

3. The touch panel of claim 2 , wherein the first electrode unit, the actuator and the second electrode unit are sequentially aligned on the second substrate.

4. The touch panel of claim 2 , wherein the actuator is interposed between the first electrode unit and the second electrode unit.

5. The touch panel of claim 2 , wherein a sum of a thickness of the first electrode unit and a thickness of the actuator corresponds to the depth of the recess part.

6. The touch panel of claim 5 , wherein the recess part has the depth in a range of 1 nm to 200 μm.

7. The touch panel of claim 2 , wherein a plurality of recess parts are aligned while extending in the first and second directions.

8. The touch panel of claim 7 , wherein the recess part has a width in a range of 100 μm to 1 mm.

9. The touch panel of claim 2 , wherein at least one of the first and second electrode units has a thickness in a range of 1 nm to 100 nm.

10. The touch panel of claim 1 , wherein the actuator includes at least one selected from a group consisting of hydrogel, nation, electroactive polymer, a piezoelectric actuator, and a MEMS (micro electro mechanical systems) actuator.

11. The touch panel of claim 2 , wherein at least one of the first and second electrode units includes at least one selected from a group consisting of indium tin oxide (ITO), carbon nano tube, Ag nano wire, graphene, and conductive polymer.

12. The touch panel of claim 1 , wherein the second substrate includes a glass or a film.

13. The touch panel of claim 2 , further comprising a protective unit on the second substrate.

14. The touch panel of claim 13 , wherein the protective unit is aligned on the second electrode unit.

15. The touch panel of claim 14 , wherein the protective unit includes a polymer film.

16. The touch panel of claim 1 , wherein the recess part is formed on a bottom surface of the second substrate.

17. A liquid crystal display comprising:
a liquid crystal panel for displaying images; and
a touch panel aligned at a display side of the liquid crystal panel such that information is input thereto from an outside,
wherein the touch panel comprises an active area for detecting position of an input device and a dummy area disposed around the active area, and the touch panel further comprises:
an input unit for inputting the information; and
a haptic unit for applying vibration;
wherein the input unit comprises:
a first substrate;
a sensor unit for detecting an input position on the first substrate; and
a wiring electrically connected to the sensor unit;
wherein the haptic unit comprises:
a second substrate on the first substrate;
a recess part on one surface of the second substrate;
an electrode unit aligned on the second substrate to receive position information; and
an actuator aligned on the recess part to transfer vibration force;
wherein the second substrate comprises a first thickness and a second thickness in the active area,
wherein the first thickness corresponds to a thickness of the second substrate in the dummy area,
wherein the second thickness corresponds to a thickness excluding a depth of the recess part from the first thickness,
wherein the first thickness is greater than the second thickness,
wherein the recess part has a concave structure,
wherein the actuator is disposed in the concave structure of the active area, and
wherein the actuator is transparent.

18. A touch panel comprising an active area for detecting position of an input device and a dummy area disposed around the active area, the touch panel further comprising:
an input unit for inputting information; and
a haptic unit positioned on the input unit to apply vibration,
wherein the input unit comprises:
a substrate;
a sensor unit for detecting an input position on the substrate; and
a wiring electrically connected to the sensor unit;
wherein the haptic unit comprises:
a recess part on one surface of the substrate;
an electrode unit aligned on the substrate to receive position information; and
an actuator aligned on the recess part to transfer vibration force;
wherein the substrate comprises a first thickness and a second thickness in the active area,
wherein the first thickness corresponds to a thickness of the substrate in the dummy area,
wherein the second thickness corresponds to a thickness excluding a depth of the recess part from the first thickness,
wherein the first thickness is greater than the second thickness,
wherein the recess part has a concave structure,
wherein the actuator is disposed in the concave structure of the active area, and
wherein the actuator is transparent.

19. The touch panel of claim 18 , wherein the input unit and the haptic unit are provided on the same substrate.

20. The touch panel of claim 18 , wherein the substrate includes a first surface and a second surface opposite to each other, and
wherein the input unit is provided on the first surface and the haptic unit is provided on the second surface.

Assignees

• Yun Ji Sun
• You Young Sun
• Lee Yong Jin
• Chai Kyoung Hoon
• Lg Innotek Co Ltd

Inventors

• Yun Ji Sun
• You Young Sun
• Lee Yong Jin
• Chai Kyoung Hoon

Classifications

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/016 Primary

  Input arrangements with force or tactile feedback as computer generated output to the user · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title