RESISTIVE TOUCH PANEL, COMPOSITE TOUCH PANEL, METHOD OF DRIVING TOUCH PANEL, AND DISPLAY APPARATUS

• US 20160188050A1
• Filed: 12/21/2015
• Published: 06/30/2016
• Est. Priority Date: 12/26/2014
• Status: Active Grant

• Current Assignee: Tianma Microelectronics Company Limited
• Original Assignee: NLT Technologies, Ltd. (Tianma Microelectronics Company Limited)
• Inventors: UCHIYAMA, Yuichi
• Granted Patent: US 10,642,439 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04104 Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• 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 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A resistive touch panel includes a first substrate provided with a transparent conductive film electrically floating on an entire surface thereof, a second substrate provided with a plurality of strip-shaped electrodes made of a transparent conductive film at a predetermined interval so that the transparent conductive film of the second substrate faces the transparent conductive film of the first substrate, and a detection section for detecting a ratio in which a signal transmitted to a first strip-shaped electrode of the second substrate is attenuated through a transmission path reaching a second strip-shaped electrode of the second substrate adjacent to the first strip-shaped electrode via the transparent conductive film of the first substrate from the first strip-shaped electrode.

Claims

1. A resistive touch panel, comprising:

a first substrate including a transparent conductive film electrically floating on an entire surface thereof;

a second substrate including a plurality of strip-shaped electrodes made of a transparent conductive film at a predetermined interval so that the transparent conductive film of the second substrate faces the transparent conductive film of the first substrate; and

a detection section configured to detect a ratio in which a signal transmitted to a first strip-shaped electrode of the second substrate is attenuated through a transmission path reaching a second strip-shaped electrode of the second substrate adjacent to the first strip-shaped electrode via the transparent conductive film of the first substrate from the first strip-shaped electrode.

2. The resistive touch panel according to claim 1,

wherein the strip-shaped electrodes include a plurality of transmission electrodes and a plurality of reception electrodes which are alternately arranged,

the resistive touch panel further comprises:

a plurality of transmission sections configured to transmit a signal to the plurality of transmission electrodes; and

a plurality of reception sections configured to receive a signal from the plurality of reception electrodes, and

each transmission electrode is connected with one or a plurality of the transmission sections, and each reception electrode is connected with one or a plurality of the reception sections.

3. The resistive touch panel according to claim 2,

wherein each transmission electrode is connected to the transmission sections on both sides of each transmission electrode, and each reception electrode is connected to the reception sections on both sides of each reception electrode.

4. The resistive touch panel according to claim 1,

wherein the first substrate and the second substrate are bonded to each other via a seal material having a predetermined thickness.

5. The resistive touch panel according to claim 1,

wherein the first substrate and the second substrate are fixed by a structure including slits formed therein at a predetermined interval.

6. A composite touch panel, comprising:

the resistive touch panel according to claim 1; and

a capacitive touch panel which is provided on a side of the first substrate of the resistive touch panel.

7. The composite touch panel according to claim 6,

wherein the transparent conductive film of the first substrate serves as a shield film to block radiation noise occurring from a side of the second substrate.

14. A display apparatus comprising the resistive touch panel according to claim 1 mounted thereon.

15. A display apparatus comprising the composite touch panel according to claim 6 mounted thereon.

8. A method of driving a resistive touch panel which comprises a first substrate including a transparent conductive film electrically floating on an entire surface thereof, and a second substrate including a plurality of strip-shaped electrodes made of a transparent conductive film at a predetermined interval so that the transparent conductive film of the second substrate faces the transparent conductive film of the first substrate, wherein the strip-shaped electrodes include a plurality of transmission electrodes and a plurality of reception electrodes which are alternately arranged, and the resistive touch panel further comprises a plurality of transmission section configured to transmit a signal to the plurality of transmission electrodes, and a plurality of reception sections configured to receive a signal from the plurality of reception electrodes, and each transmission electrode is connected with one or a plurality of the transmission sections, and each reception electrode is connected with one or a plurality of the reception sections, comprising:

sequentially transmitting a pulse signal to the corresponding transmission electrode by the plurality of the transmission sections;

receiving the pulse signal by the reception section connected to the reception electrode adjacent to the transmission electrode to which the pulse signal is transmitted; and

specifying a touch position based on the received pulse signal.

9. The method of driving a resistive touch panel according to claim 8,

further comprising specifying a touch position in a direction orthogonal to an extending direction of the strip-shaped electrodes, based on a position of the reception electrode connected to the reception section which receives the pulse signal.

10. The method of driving a resistive touch panel according to claim 8,

further comprising specifying a touch position in an extending direction of the strip-shaped electrodes, based on an attenuation of a waveform of the received pulse signal with respect to a waveform of the transmitted pulse signal.

11. The method of driving a resistive touch panel according to claim 10,

wherein each transmission electrode is connected to the transmission sections on both sides of each transmission electrode, and each reception electrode is connected to the reception sections on both sides of each reception electrode, and

the method further comprises specifying a touch position in the extending direction of the strip-shaped electrodes, based on attenuations of waveforms of pulse signals received by the respective reception sections on both sides, with respect to a waveform of a pulse signal transmitted from the transmission section on one side.

12. The method of driving a resistive touch panel according to claim 11,

further comprising specifying a touch position in the extending direction of the strip-shaped electrodes, based on attenuations of waveforms of pulse signals received by the respective reception sections on both sides, with respect to a waveform of a pulse signal transmitted from the transmission section on one side, and based on attenuations of waveforms of pulse signals received by the respective reception sections on both sides, with respect to a waveform of a pulse signal transmitted from the transmission section on the other side.

13. A method of driving a composite touch panel which comprises a resistive touch panel driven by the driving method according to claim 8, and a capacitive touch panel disposed on a side of the first substrate of the resistive touch panel, comprising

intermittently driving the capacitive touch panel, and driving the resistive touch panel at timing in which the capacitive touch panel is not driven, to simultaneously perform a touch position determination by the capacitive touch panel and a touch position determination by the resistive touch panel.