Display device

• US 8,947,381 B2
• Filed: 02/27/2012
• Issued: 02/03/2015
• Est. Priority Date: 03/01/2011
• Status: Active Grant

• Current Assignee: Alps Alpine Co., Ltd., Fujitsu Ten Limited (DENSO Corporation)
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.), Fujitsu Ten Limited (DENSO Corporation)
• Inventors: Hamatani, Kiyoshi, Miyazato, Kohji, Umetsu, Eiji, Jiyama, Motoya, Sugamoto, Naoki, Batou, Nobuyuki, Yanai, Hiroyuki, Yamamoto, Sadaharu, Yanagi, Shuji, Ishizone, Masahiko
• Primary Examiner(s): Abdulselam, Abbas
• Assistant Examiner(s): STEPP JONES, SHAWNA T
• Application Number:
  US13/405,829
• Publication Number:
  US 20120223900A1
• Time in Patent Office: 1,072 Days
• Field of Search: 345/173
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/04142 the force sensing means being located peripherally, e.g. disposed at the corners or at the side of a touch sensing plate
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment

Abstract

A display device according to an embodiment includes a touch panel, a plurality of detecting units, a blocking unit, and a calculating unit. The display device is incorporated in a vehicle, and the touch panel receives a pressing operation. The plurality of detecting units detect a pressure value on the touch panel.

Claims

1. A display device incorporated in a vehicle, comprising:

a touch panel that receives a pressing operation;

a plurality of detecting units that detect pressure values on the touch panel;

a storage unit that stores a vibration level indicating a vibration state of the vehicle, the vibration level being classified in advance according to a speed or an acceleration of the vehicle;

a blocking unit that blocks a frequency band of the pressure values detected by the detecting unit, the pressure values corresponding to the vibration state of the vehicle and based on the vibration level indicating the vibration state of the vehicle, the vibration level being classified in advance according to the speed or the acceleration of the vehicle; and

a calculating unit that calculates a pressed position based on a result of blocking by the blocking unit.

2. The display device according to claim 1, further comprising a vibration estimating unit that estimates the vibration state of the vehicle by classifying the vibration state of the vehicle by the vibration level, wherein

the blocking unit changes the frequency band based on the vibration state of the vehicle estimated by the vibration estimating unit.

3. The display device according to claim 2, further comprising a map-information acquiring unit that acquires map information including information related to a state of a road, wherein

the vibration estimating unit estimates the vibration state based on the map information acquired by the map-information acquiring unit.

4. The display device according to claim 3, further comprising a pressed-position correcting unit that corrects the pressed position calculated by the calculating unit based on the vibration state estimated by the vibration estimating unit.

5. The display device according to claim 3, wherein the calculating unit does not calculate the pressed position when a continued time indicating that a time when a pressure value detected by the detecting unit is continuously larger than a lower-limit threshold is shorter than a predetermined threshold, or when the pressure value is not within a predetermined range.

6. The display device according to claim 2, further comprising a pressed-position correcting unit that corrects the pressed position calculated by the calculating unit based on the vibration state estimated by the vibration estimating unit.

7. The display device according to claim 6, wherein the calculating unit does not calculate the pressed position when a continued time indicating that a time when a pressure value detected by the detecting unit is continuously larger than a lower-limit threshold is shorter than a predetermined threshold, or when the pressure value is not within a predetermined range.

8. The display device according to claim 2, wherein the calculating unit does not calculate the pressed position when a continued time indicating that a time when a pressure value detected by the detecting unit is continuously larger than a lower-limit threshold is shorter than a predetermined threshold, or when the pressure value is not within a predetermined range.

9. The display device according to claim 2, wherein the blocking unit does not block the frequency band when the vibration estimating unit estimates that the vehicle is stopped.

10. The display device according to claim 1, wherein the calculating unit does not calculate the pressed position when a continued time indicating that a time when a pressure value detected by the detecting unit is continuously larger than a lower-limit threshold is shorter than a predetermined threshold, or when the pressure value is not within a predetermined range.

11. The display device according to claim 1, further comprising a pressing-operation detecting unit that detects whether the pressing operation is received, wherein

the calculating unit calculates the pressed position when a fact that the pressing operation is received has been detected by the pressing-operation detecting unit.

12. The display device according to claim 1, further comprising a person detecting unit that detects a pressing operation by a person, wherein the calculating unit calculates the pressed position when the pressing operation by a person is detected by the person detecting unit.

13. A display device incorporated in a vehicle, comprising:

a touch panel that receives a pressing operation;

a plurality of detecting means for detecting pressure values on the touch panel;

a storage means for storing a vibration level indicating a vibration state of the vehicle, the vibration level being classified in advance according to the seed or an acceleration of the vehicle;

a blocking means for blocking a frequency band of the pressure values detected by the detecting means, the pressure values corresponding to the vibration state of the vehicle, based on the vibration level indicating the vibration state of the vehicle, the vibration level being classified in advance according to the speed or the acceleration of the vehicle; and

a calculating means for calculating a pressed position based on a result of blocking by the blocking means.

14. A display device incorporated in a vehicle, comprising:

a touch panel that receives a pressing operation;

a plurality of detecting units that detect pressure values on the touch panel;

a blocking unit that blocks a frequency band of the pressure values detected by the detecting unit, the pressure values corresponding to a vibration state of the vehicle and based on a vibration level indicating the vibration state of the vehicle, the vibration level being set in advance;

a calculating unit that calculates a pressed position based on a result of blocking by the blocking unit; and

a storage unit storing a plurality of frequency components caused by vibrations of the vehicle corresponding to each vibration state of the vehicle, wherein the blocking unit decides a frequency component to be blocked based on the vibration state of the vehicle.