Touch display panel and display device

A touch display panel, comprising:

• a first substrate and a second substrate disposed opposite to each other;
• a black matrix formed on the first substrate and only transmitting light within a first wavelength range, wherein the black matrix is configured to transmit light of human body irradiation which is in a range of 9-11 μm;
• and
• a plurality of light sensing elements, a plurality of scan lines and a plurality of signal lines formed on the second substrate,
• wherein the light sensing elements are shaded by the black matrix;
• each of the scan lines is connected to a first end of a corresponding one of the light sensing elements, and each of the signal lines is connected to a second end of the corresponding one of the light sensing elements;
• and
• the light sensing element is configured to generate a touch signal according to the received light within the first wavelength range and the scanning signal provided by the scan line and supply the touch signal to the corresponding signal line.

A touch display panel, comprising:

• a first substrate and a second substrate disposed opposite to each other;
• a black matrix formed directly on the first substrate intermittent with stripe shaped color filters without contacting a display layer and wherein the black matrix only transmits light within a first wavelength range between 9-11 μm of a human touch and blocks a second wavelength range of a natural light;
• and
• a plurality of light sensing elements uniformly distributed over the first substrate, a plurality of scan lines and a plurality of signal lines formed on the second substrate, wherein the black matrix shades exclusively all the light sensing elements and not switching elements;
• each of the scan lines is connected to a first end of a corresponding one of the light sensing elements, and each of the signal lines is connected to a second end of the corresponding one of the light sensing elements;
• and the light sensing element is configured to generate a touch signal according to the received light within the first wavelength range and the scanning signal provided by the scan line and supply the touch signal to the corresponding signal line.