Touch display panel and display device

A touch display panel, comprising:

• a touch display module having a light exit surface, the touch display module being operable to display an image via the light exit surface and to identify a touch position of a touch object on the displayed image;
• a plurality of touch feedback electrodes arranged in an array on the light exit surface, each of the plurality of touch feedback electrodes being operable to vibrate in response to a drive signal applied thereto to provide touch feedback to the touch object;
• a first controller operably connected to the touch display module and the plurality of touch feedback electrodes, the first controller being configured to generate and provide the drive signal to at least one of the plurality of touch feedback electrodes corresponding to an identified touch position in response to identification of the touch position by the touch display module;
• and
• a second controller configured to determine a texture level of the displayed image at the touch position,
• wherein the first controller is further configured to generate the drive signal based on the determined texture level such that an amplitude of the drive signal reflects the determined texture level, the first controller comprising a microcontroller, an output circuit, and a switching network coupled between the output circuit and the plurality of touch feedback electrodes, wherein:
• the microcontroller is configured to a) determine the amplitude of the drive signal based on the determined texture level and generate a first control signal indicative of the determined amplitude, and b) generate, based on the identified touch position, a second control signal instructing the switching network to couple the output circuit to the at least one touch feedback electrode corresponding to the identified touch position;
• the output circuit is operable to generate the drive signal having the determined amplitude in dependence on the first control signal;
• and
• the switching network is operable to couple the output circuit to the at least one touch feedback electrode corresponding to the identified touch position in dependence on the second control signal, and
• wherein the output circuit comprises a multi-harmonic oscillator, an amplifier, a voltage booster, and an adjustment circuit, wherein:
• the multi-harmonic oscillator is operable to generate a pulse signal;
• the amplifier is connected to the multi-harmonic oscillator and the voltage booster and is operable to amplify the pulse signal generated by the multi-harmonic oscillator and output the amplified pulse signal to the voltage booster;
• the voltage booster is connected to the adjustment circuit and the switching network and is operable to boost an amplitude of the pulse signal amplified by the amplifier and to supply the boosted pulse signal to the switching network as the drive signal;
• and
• the adjustment circuit is connected to the microcontroller and is operable to adjust the amplitude of the pulse signal output by the voltage booster in dependence on the first control signal from the microcontroller.