Liquid crystal display device and brightness compensating method thereof

1. A liquid crystal display device, comprising:

a liquid crystal display panel;

a touch sensor, configured to convert a position and a force of a press from a user on the liquid crystal display panel into an electrical signal;

a touch control board, configured to scan and analyze the electrical signal;

a mainboard, configured to receive the scanned electrical signal and transmit a drive voltage instruction and a compensation voltage instruction; and

a logic board, comprising a code storage device and an electrical level controller, wherein the code storage device stores a grayscale compensation table, the grayscale compensation table is configured to provide a compensation voltage message according to the compensation voltage instruction, the electrical level controller is configured to supply the liquid crystal display panel with a compensation voltage according to the compensation voltage message, the compensation voltage is configured to make a rotation angle of liquid crystals of a press region greater than a rotation angle of liquid crystals of a non-press region for offsetting deformation on the liquid crystals of the press region;

wherein the electrical level controller is further configured to supply a drive voltage to drive the liquid crystal display device to display a target brightness in the non-press region;

wherein the touch sensor comprises at least one of a capacitive touch display panel, an infrared touch panel, or a pressure sensitive layer;

wherein a step of obtaining the grayscale compensation table comprises:

obtaining the compensation voltage for the liquid crystal display device to achieve a target brightness in the user press region;

establishing a first relationship between the target brightness and the compensation voltage;

establishing a second relationship between the compensation voltage and the electrical signal; and

obtaining a grayscale compensation table according to the first relationship and the second relationship, where the grayscale compensation table is configured to provide the compensation voltage according to the electrical signal.

2. The liquid crystal display device according to claim 1 , wherein the touch sensor comprises the capacitive touch display panel, and the capacitive touch display panel comprises a transmitter electrode and a receiver electrode, the transmitter electrode is configured to transmit an electrical signal, the receiver electrode is configured to receive the electrical signal, and the transmitter electrode and the receiver electrode form a mesh electrode configured to convert a finger coordinate and a finger touch area of the user into the electrical signal.

3. The liquid crystal display device according to claim 1 , wherein the touch sensor comprises the infrared touch panel, and the infrared touch panel comprises an infrared transmitter diode and an infrared receiver diode, the infrared transmitter diode and the infrared receiver diode form a mesh infrared matrix, the infrared matrix configured to convert a finger coordinate and a finger touch area of the user into the electrical signal.

4. The liquid crystal display device according to claim 1 , wherein the touch sensor further comprises the pressure sensitive layer, and the pressure sensitive layer is configured to convert a sensed pressure into the electrical signal.

5. The liquid crystal display device according to claim 1 , wherein the step of obtaining the compensation voltage for the liquid crystal display device to achieve the target brightness in the user press region comprises:

dividing the liquid crystal display device into the press region and the non-press region;

obtaining a first voltage for the liquid crystal display device to achieve the target brightness in the non-press region;

obtaining a second voltage for the liquid crystal display device to achieve the target brightness in the user press region; and

obtaining the compensation voltage of the liquid crystal display device in the user press region according to the first voltage and the second voltage.

6. The liquid crystal display device according to claim 5 , wherein the step of dividing the liquid crystal display device into the press region and the non-press region comprises:

the touch sensor transmitting an electrical signal including a user position message to the touch control board, the touch control board scanning the electrical signal to divide the liquid crystal display device into the press region and the non-press region.

7. A liquid crystal display device, comprising:

a liquid crystal display panel;

a touch sensor, configured to convert a position and a force of a press from a user on the liquid crystal display panel into an electrical signal;

a touch control board, configured to scan and analyze the electrical signal;

a mainboard, configured to receive the scanned electrical signal and transmit a drive voltage instruction and a compensation voltage instruction; and

a logic board, comprising a code storage device and an electrical level controller, wherein the code storage device stores a grayscale compensation table, the grayscale compensation table is configured to provide a compensation voltage message according to the compensation voltage instruction, the electrical level controller is configured to supply the liquid crystal display panel with a compensation voltage according to the compensation voltage message, the compensation voltage is configured to make a rotation angle of liquid crystals of a press region greater than a rotation angle of liquid crystals of a non-press region for offsetting deformation on the liquid crystals of the press region;

wherein a step of obtaining the grayscale compensation table comprises:

obtaining the compensation voltage for the liquid crystal display device to achieve a target brightness in the user press region;

establishing a first relationship between the target brightness and the compensation voltage;

establishing a second relationship between the compensation voltage and the electrical signal; and

obtaining a grayscale compensation table according to the first relationship and the second relationship, wherein the grayscale compensation table is configured to provide the compensation voltage according to the electrical signal.

8. The liquid crystal display device according to claim 7 , wherein the electrical level controller is further configured to supply a drive voltage to drive the liquid crystal display device to display a target brightness in the non-press region.

9. The liquid crystal display device according to claim 7 , wherein the touch sensor comprises a capacitive touch display panel, the capacitive touch display panel comprises a transmitter electrode and a receiver electrode, the transmitter electrode is configured to transmit an electrical signal, the receiver electrode is configured to receive the electrical signal, and the transmitter electrode and the receiver electrode form a mesh electrode configured to convert a finger coordinate and a finger touch area of the user into the electrical signal.

10. The liquid crystal display device according to claim 7 , wherein the touch sensor comprises an infrared touch panel, and the infrared touch panel comprises an infrared transmitter diode and an infrared receiver diode, the infrared transmitter diode and the infrared receiver diode form a mesh infrared matrix, the infrared matrix configured to convert a finger coordinate and a finger touch area of the user into the electrical signal.

11. The liquid crystal display device according to claim 7 , wherein the touch sensor further comprises a pressure sensitive layer, and the pressure sensitive layer configured to convert a sensed pressure into the electrical signal.

12. The liquid crystal display device according to claim 7 , wherein the step of obtaining the compensation voltage for the liquid crystal display device to achieve the target brightness in the user press region comprises:

dividing the liquid crystal display device into the press region and the non-press region;

obtaining a first voltage for the liquid crystal display device to achieve the target brightness in the non-press region;

obtaining a second voltage for the liquid crystal display device to achieve the target brightness in the user press region; and

obtaining the compensation voltage of the liquid crystal display device in the user press region according to the first voltage and the second voltage.

13. The liquid crystal display device according to claim 12 , wherein the step of dividing the liquid crystal display device into the press region and the non-press region comprises:

the touch sensor transmitting an electrical signal including a user position message to the touch control board, the touch control board scanning the electrical signal to divide the liquid crystal display device into the press region and the non-press region.

14. The liquid crystal display device according to claim 7 , wherein the step of establishing the first relationship between the target brightness and the compensation voltage comprises:

converting the target brightness into a grayscale value, and fitting the compensation voltage with the grayscale value to establish a first functional relationship between the compensation voltage and the grayscale value, wherein the first functional relationship between the compensation voltage and the grayscale value is the first relationship.

15. The liquid crystal display device according to claim 7 , wherein the electrical signal comprises a position relationship and a user press force relationship, and the step of establishing the second relationship between the compensation voltage and the electrical signal comprises:

converting the position relationship into a first electrical signal, converting the user press force relationship into a second electrical signal, wherein the first electrical signal is relevant to a position to be compensated and the second electrical signal is relevant to a voltage to be compensated, fitting the second electrical signal, the first electrical signal, and the compensation voltage to obtain a second functional relationship, wherein the second functional relationship is the second relationship.

16. The liquid crystal display device according to claim 7 , wherein in the step of obtaining the grayscale compensation table according to the first relationship and the second relationship wherein the grayscale compensation table is configured to provide the compensation voltage according to the electrical signal, the first relationship is configured to obtain a relationship between the compensation voltage and the target brightness, the second relationship is configured to obtain a relationship between the compensation voltage, a user press position, and a user press finger, the code storage device is configured to provide the compensation voltage according to the target brightness and the electrical signal.