Pixel data compensation method and device for display device, display device

3:

• The pixel data compensation method according to claim 1, wherein the row compensation coefficient of the n-th row of sub-pixels is:
• K
• n
• =
• N
• ⁢
• -
• ⁢
• n
• N
• ⁢
• -
• ⁢
• 1
• ⁢
• ⁢
• or
• ⁢
• ⁢
• K
• n
• =
• N
• ⁢
• -
• ⁢
• n
• N
• .

4:

• The pixel data compensation method according to claim 1, wherein
• the voltage deviation ΔVdata corresponding to the initial pixel data Vdata of the sub-pixel and the initial pixel data Vdata of the sub-pixel satisfy a first relation:
• ΔVdata=α(Vdata−Vref)+β,
• where α, β are compensation coefficients and are constants for the display device;
• and
• Vref is a charging reference voltage of a storage capacitor for compensating a threshold voltage of the driving transistor in the sub-pixel.

8:

• A pixel data compensation device for a display device, the display device comprising N rows of sub-pixels, the pixel data compensation device comprising:
• a pixel compensation quantity operation circuit, which is configured to obtain, for a sub-pixel of an n-th row in a column, a pixel compensation quantity Q of the sub-pixel according to a row compensation coefficient Kn of the n-th row of sub-pixels and a voltage deviation ΔVdata corresponding to an initial pixel data Vdata of the sub-pixel;
• and
• a compensation pixel data operation circuit, which is configured to compensate the initial pixel data Vdata of the sub-pixel according to the pixel compensation quantity Q of the sub-pixel to obtain a compensated pixel data V′data of the sub-pixel,
• wherein the row compensation coefficient Kn decreases as a row number of the row in which the sub-pixel is located increases, and 0≤Kn≤1, 1≤n≤N, and 1≤N.

10:

• The pixel data compensation device according to claim 8, wherein the pixel compensation quantity operation circuit comprises:
• a first sub-operation circuit, a second sub-operation circuit and a third sub-operation circuit,
• wherein a first input terminal of the first sub-operation circuit is coupled to a reference voltage terminal to receive the reference voltage Vref, a second input terminal of the first sub-operation circuit is coupled to an initial pixel data input terminal to receive the initial pixel data Vdata, and an output terminal of the first sub-operation circuit is coupled to a first input terminal of the second sub-operation circuit;
• a second input terminal of the second sub-operation circuit is coupled to a first voltage terminal to receive a first voltage, and an output terminal of the second sub-operation circuit is coupled to a first input terminal of the third sub-operation circuit;
• and
• an output terminal of the third sub-operation circuit is coupled to the compensation pixel data operation circuit, and the third sub-operation circuit is configured to invert the pixel compensation quantity of the sub-pixel that is obtained to generate an inverted pixel compensation quantity and output the inverted pixel compensation quantity to the compensation pixel data operation circuit.

11:

• The pixel data compensation device according to claim 10, wherein
• a voltage gain of the first sub-operation circuit is equal to α;
• a first voltage of the first voltage terminal is β, a voltage gain of the second sub-operation circuit is equal to 1;
• and
• a voltage gain of the third sub-operation circuit is equal to the row compensation coefficient Kn.

16:

• The pixel data compensation device according to claim 15, wherein the variable resistor sub-circuit further comprises a counter and an encoder, wherein
• the counter is coupled to a row sync signal controller and a field sync signal controller, and is configured to count a row number n of a currently-switched-on row of sub-pixels according to a row sync signal of the row sync signal controller and a field sync signal of the field sync signal controller;
• and
• the encoder is coupled to the plurality of switches connected in parallel with the base resistors and the counter, and is configured to encode according to a counting result of the counter, and issue a control signal for controlling the on/off states of the plurality of switches to adjust the resistance value of the variable resistor sub-circuit.

20:

• A display device according to claim 18, further comprising a digital-to-analog converter and a buffer, wherein
• the digital-to-analog converter is configured to convert an input display data, and output the input display data that is converted to the buffer for amplification to obtain the initial pixel data Vdata;
• and
• the pixel data compensation device is coupled to an output terminal of the buffer to compensate the initial pixel data Vdata.