Floating touch display apparatus

1. A floating touch display apparatus, comprising:

a display panel, comprising:

a plurality of pixels, each pixel of the display panel including n sub-pixels, and the n sub-pixels respectively emitting light having wavelengths in a first to an n-th wavebands to display and image, n being an integer greater than zero;

a plurality of light-emitting units, wherein each light-emitting unit is configured for emitting light having a wavelength in a (n+1)-th waveband, and wavelength ranges of the light in the first to the (n+1)-th wavebands do not coincide;

a plurality of light-receiving units, wherein each light-receiving unit is configured for receiving the light in the (n+1)-th waveband and generating a touch identifying signal; and

a touch identifying unit, wherein the touch identifying unit identifies a floating touch action according to the touch identifying signal generated by the light-receiving unit, wherein,

the light-emitting unit includes first quantum dots, which emit the light in the (n+1)-th waveband upon being irradiated with light or applied with a voltage;

the light-receiving unit includes second quantum dots, and each of the second quantum dots itself absorbs the light in the (n+1)-th waveband and itself converts the light to an electrical signal serving as the touch identifying signal;

the touch identifying unit identifies the floating touch action according to the electrical signal;

the display panel is a quantum dot display panel, the quantum dot display panel comprises an anode layer, a cathode layer, and a quantum dot layer between the anode layer and the cathode layer, and the quantum dot layer comprises quantum dots for implementing display in each of the n sub-pixels; and

in an opening region, which is surrounded by a black matrix of the display panel, of a first sub-pixel among the n sub-pixels, the first quantum dots and/or the second quantum dots are mixed with the quantum dots for implementing display.

2. The floating touch display apparatus according to claim 1 , wherein, the light having the wavelength in the (n+1)-th waveband is an invisible light.

3. The floating touch display apparatus according to claim 2 , wherein, the light having the wavelength in the (n+1)-th waveband is an infrared light.

4. The floating touch display apparatus according to claim 1 , wherein, in a second sub-pixel among the n sub-pixels, the first quantum dots and the second quantum dots are located in a region corresponding to the black matrix of the display panel.

5. The floating touch display apparatus according to claim 4 , wherein,

in the second sub-pixel among the n sub-pixels, the first quantum dots and the second quantum dots are provided in a same layer with the quantum dots for implementing display.

6. The floating touch display apparatus according to claim 1 , wherein, the light-emitting unit and the light-receiving unit are provided in each pixel.

7. The floating touch display apparatus according to claim 1 , wherein,

the display panel includes the anode layer, a hole transport layer, the quantum dot layer, an electron transport layer and the cathode layer which are provided sequentially.

8. The floating touch display apparatus according to claim 1 , wherein, the light-emitting unit and the light-receiving unit are provided in part of the pixels.

9. The floating touch display apparatus according to claim 1 , wherein, the light-emitting unit and the light-receiving unit are not provided in a same pixel.

10. The floating touch display apparatus according to claim 1 , wherein, each light-emitting unit corresponds to several light-receiving units.

11. The floating touch display apparatus according to claim 1 , wherein, each light-receiving unit corresponds to several light-emitting units.

12. The floating touch display apparatus according to claim 1 , wherein, in the opening region, which is surrounded by the black matrix of the display panel, of the first sub-pixel among the n sub-pixels, both of the first quantum dots and the second quantum dots are mixed with the quantum dots for implementing display.