Piezoelectric touch control film and piezoelectric touch display panel comprising same

Abstract

The invention relates to a piezoelectric touch control film. The piezoelectric touch control film comprises a transparent flexible substrate, a metal electrode and a [beta]-phase polyvinylidene fluoride-based piezoelectric film which are sequentially arranged, the piezoelectric touch control film is transparent, the light transmittance of the piezoelectric touch control film is above 80%, the piezoelectric film is prepared by a solution-processable piezoelectric material through adoption of a coating method, and the piezoelectric material comprises a vinylidene fluoride-based polymer and a molecular ferroelectric with a plurality of polar axes. The preparation method comprises the following steps of: providing a substrate, wherein the substrate comprises a transparent flexible substrate and a metal electrode arranged on the transparent flexible substrate; and coating the solution containing the piezoelectric material on a base material to form a liquid film on the base material, and removing the solvent to obtain the piezoelectric touch film. The piezoelectric touch control film is flat and compact, controllable in thickness and high in transparency and has better piezoelectricitywithout electric field polarization, and the method is quick and efficient, can be achieved at a room temperature, and is suitable for large-area production.

Description

technical field

[0001] The present invention relates to the field of display technology, in particular to a piezoelectric touch film and a piezoelectric touch display panel comprising the same. Background technique

[0002] With the development of mobile electronic devices, display panels with touch functions are more and more widely used in man-machine interfaces. At present, capacitive, resistive and optical sensing are the three main technologies for preparing touch display panels. Their common feature is that a reference electrical signal or optical signal is applied in advance, and the touch function is realized by detecting changes in the electrical signal or optical signal when a finger or a stylus touches the display touch panel. However, they are easily affected by changes in the external environment because a reference electrical or optical signal is pre-applied. For example, the optical signal of the optical sensor is easily affected by the ambient light, and it...

Examples

Embodiment 1

[0047] This embodiment relates to a method for rapidly preparing a polyvinylidene fluoride piezoelectric touch film with a high content of β-phase by using a knife coating method.

[0048] The piezoelectric touch film includes a transparent flexible substrate, a metal electrode, and a β-phase vinylidene fluoride piezoelectric film that are arranged in sequence. The piezoelectric film includes β-phase PVDF and dabcoHReO 4 , β-phase PVDF accounts for 80% of the mass of the piezoelectric film.

[0049] The specific steps of the preparation method of the piezoelectric touch film are as follows:

[0050] 1) Dissolve 0.552g PVDF powder in 10mL N,N-dimethylformamide / acetone (DMF / Ac) mixed solvent, stir mechanically, then add 0.048gdabcoHReO 4 , continue to stir under heating conditions to obtain dabcoHReO 4 -PVDF mixed solution.

[0051] 2) Set the substrate temperature to room temperature (25°C), set the scraping speed to 10mm / s, and the distance between the scraper and the subst...

Embodiment 2

[0053] The piezoelectric touch film was prepared according to the method of Example 1, except that in step 2), the temperature of the substrate was set to 40°C.

Embodiment 3

[0055] The piezoelectric touch film was prepared according to the method of Example 1, except that in step 2), the substrate temperature was set to 50°C.

technical field

[0001] The present invention relates to the field of display technology, in particular to a piezoelectric touch film and a piezoelectric touch display panel comprising the same. Background technique

[0002] With the development of mobile electronic devices, display panels with touch functions are more and more widely used in man-machine interfaces. At present, capacitive, resistive and optical sensing are the three main technologies for preparing touch display panels. Their common feature is that a reference electrical signal or optical signal is applied in advance, and the touch function is realized by detecting changes in the electrical signal or optical signal when a finger or a stylus touches the display touch panel. However, they are easily affected by changes in the external environment because a reference electrical or optical signal is pre-applied. For example, the optical signal of the optical sensor is easily affected by the ambient light, and it...

Examples

Embodiment 1

[0047] This embodiment relates to a method for rapidly preparing a polyvinylidene fluoride piezoelectric touch film with a high content of β-phase by using a knife coating method.

[0048] The piezoelectric touch film includes a transparent flexible substrate, a metal electrode, and a β-phase vinylidene fluoride piezoelectric film that are arranged in sequence. The piezoelectric film includes β-phase PVDF and dabcoHReO 4 , β-phase PVDF accounts for 80% of the mass of the piezoelectric film.

[0049] The specific steps of the preparation method of the piezoelectric touch film are as follows:

[0050] 1) Dissolve 0.552g PVDF powder in 10mL N,N-dimethylformamide / acetone (DMF / Ac) mixed solvent, stir mechanically, then add 0.048gdabcoHReO 4 , continue to stir under heating conditions to obtain dabcoHReO 4 -PVDF mixed solution.

[0051] 2) Set the substrate temperature to room temperature (25°C), set the scraping speed to 10mm / s, and the distance between the scraper and the subst...

Embodiment 2

[0053] The piezoelectric touch film was prepared according to the method of Example 1, except that in step 2), the temperature of the substrate was set to 40°C.

Embodiment 3

[0055] The piezoelectric touch film was prepared according to the method of Example 1, except that in step 2), the substrate temperature was set to 50°C.

Images