TWI436341B - Voltage compensation circuit, display module, display apparatus and control methods thereof - Google Patents

Description

Voltage compensation circuit, display module, display device and control method thereof

The invention relates to a voltage compensation circuit, a display module, a display device and a control method thereof.

Display device is one of the indispensable electronic products in today's life. It was developed from the early cathode ray tube (CRT) display device to the current liquid crystal display (LCD) device and organic light-emitting device. An organic light-emitting diode (OLED) display device, etc., and is widely used in products such as communication, information, and consumer electronics.

In the case of a liquid crystal display device, it has a thin film transistor substrate, a liquid crystal layer, and a color filter substrate. The thin film transistor substrate is disposed opposite to the color filter substrate, and the liquid crystal layer is disposed between the thin film transistor substrate and the color filter substrate to form a plurality of pixels.

Referring to FIG. 1 , the conventional pixel 1 includes a transistor T ₁ , a liquid crystal capacitor C _{LC ,} and a storage capacitor C _ST . The transistor T ₁ has a gate terminal, a source terminal, and a terminal. The gate terminal of the transistor T ₁ is electrically connected to a scan line S ₁₁ , the source terminal is electrically connected to a data line D ₁₁ , and the drain terminal is electrically connected to one end of the liquid crystal capacitor C _LC and the storage capacitor C _ST , respectively. The other ends of the liquid crystal capacitor C _LC and the storage capacitor C _ST are electrically connected to a common electrode of one of the color filter substrates to receive a common voltage V _COM . In addition, there is a parasitic capacitance C _GD between the gate terminal of the transistor T _{1 and} the gate terminal.

Referring to FIG. 2, at a time t _1, the scan line S ₁₁ transmits a high-level scan signal to turn on the power of crystals T _1. At this time, a positive image data can be written into the liquid crystal capacitor C _LC via the data line D ₁₁ and the transistor T ₁ .

During a time t ₂ , the scan line S ₁₁ transmits a scan signal of a low level to turn off the transistor T ₁ . When the scan signal transmitted by the scan line S ₁₁ changes from the high level to the low level, due to the existence of the parasitic capacitance C _GD , the voltage change of the gate terminal of the transistor T ₁ is coupled via the parasitic capacitance C _GD , so that the liquid crystal A portion of the charge of the capacitor C _LC is transferred to the parasitic capacitance C _GD , thereby generating a feed through voltage ΔV _P , resulting in a feed through effect.

At a time t _3, the scan line S ₁₁ transmits the high-level scan signal to turn on the power crystals T _1. At this time, a negative polarity image data can be written into the liquid crystal capacitor C _LC via the data line D ₁₁ and the transistor T ₁ .

At a time t _4, the scan line S ₁₁ transmits the scan signal of low level to turn off the transistor T _1. At this time, at the same time as the description of t ₂ , a part of the charge of the liquid crystal capacitor C _LC is transferred to the parasitic capacitance C _GD , thereby generating a feedthrough voltage ΔV _n , which causes a feedthrough effect.

As described above, during the time t ₂ , the image data of the positive polarity written into the liquid crystal capacitor C _LC is affected by the feedthrough voltage ΔV _P , and the voltage level thereof is shifted to the first level L ₁ . During time t ₄ , the negative polarity image data written into the liquid crystal capacitor C _LC is affected by the feedthrough voltage ΔV _n , and its voltage level is shifted to the second level L ₂ .

The pitch of the first level L ₁ to the level of the common voltage V _COM is the first distance d1, and the pitch of the second level L ₂ to the level of the common voltage V _COM is the second distance d2. When the display screen displays an identical gray scale, and the first distance d1 and the second distance d2 are not the same, the display screen is caused to flicker.

In addition, the characteristics of the liquid crystal molecules of the liquid crystal layer are related to the ambient temperature. At different ambient temperatures, the degree of feedthrough effect caused by it is also different, which is one of the reasons for the flickering phenomenon of the display screen.

In order to solve the above problem, the prior art proposes to make the first distance d1 and the second distance d2 the same size by adjusting the level of the common voltage V _COM . Structurally, since not all of the pixels have the same feedthrough voltages ΔV _P , ΔV _n , the common electrode must be divided into a plurality of blocks for corresponding adjustment. However, this method requires a large amount of data to be processed, which causes a huge burden on the arithmetic unit.

Therefore, it is an important subject to provide a voltage compensation circuit, a display module, a display device, and a control method thereof that do not need to adjust the level of the common voltage and simultaneously improve the feedthrough effect in consideration of temperature factors.

In view of the above problems, an object of the present invention is to provide a voltage compensation circuit, a display module, a display device, and a control method thereof that improve a feedthrough effect according to an ambient temperature.

To achieve the above objective, the present invention provides a voltage compensation circuit including a temperature sensing unit, a gamma voltage generating unit, a first compensation unit, and a signal processing unit. The temperature sensing unit outputs a control signal. The gamma voltage generating unit generates a gamma voltage signal. The first compensation unit is electrically connected to the temperature sensing unit, and outputs a first compensation signal according to the control signal. The signal processing unit is electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit, and adjusts the level of the gamma voltage signal according to the control signal and the first compensation signal.

To achieve the above object, the present invention provides a method of controlling a voltage compensation circuit. The voltage compensation circuit has a temperature sensing unit, a gamma voltage generating unit, a first compensation unit and a signal processing unit. The first compensation unit is electrically connected to the temperature sensing unit, and the signal processing unit is electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit. The voltage compensation circuit control method includes the following steps: outputting a control signal by the temperature sensing unit; generating a gamma voltage signal by the gamma voltage generating unit; outputting a first compensation signal according to the control signal by the first compensation unit; and processing by the signal The unit adjusts the level of the gamma voltage signal according to the control signal and the first compensation signal.

To achieve the above objective, the present invention provides a display module including a display panel, a data driving circuit, a timing control circuit, and a voltage compensation circuit. The data driving circuit is electrically connected to the display panel via a plurality of data lines. The timing control circuit is electrically connected to the data driving circuit. The voltage compensation circuit is electrically connected to the data driving circuit, and has a temperature sensing unit, a gamma voltage generating unit, a first compensation unit and a signal processing unit. The temperature sensing unit outputs a control signal. The gamma voltage generating unit generates a gamma voltage signal. The first compensation unit is electrically connected to the temperature sensing unit, and outputs a first compensation signal according to the control signal. The signal processing unit is electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit, and adjusts the level of the gamma voltage signal according to the control signal and the first compensation signal.

To achieve the above object, the present invention provides a control method for a display module. The display module has a display panel, a data driving circuit, a timing control circuit and a voltage compensation circuit. The data driving circuit is electrically connected to the display panel via the plurality of data lines, and the timing control circuit is electrically connected to the data driving circuit. The voltage compensation circuit is electrically connected to the data driving circuit, and has a temperature sensing unit, a gamma voltage generating unit, a first compensation unit and a signal processing unit. The first compensation unit is electrically connected to the temperature sensing unit, and the signal processing unit is electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit. The control method of the display module includes the following steps: outputting a control signal by the temperature sensing unit; generating a gamma voltage signal by the gamma voltage generating unit; outputting a first compensation signal according to the control signal by the first compensation unit; and The processing unit adjusts the level of the gamma voltage signal according to the control signal and the first compensation signal.

To achieve the above objective, the present invention provides a display device including a display module having a display panel, a data driving circuit, a timing control circuit, and a voltage compensation circuit. The data driving circuit is electrically connected to the display panel via a plurality of data lines. The timing control circuit is electrically connected to the data driving circuit. The voltage compensation circuit is electrically connected to the data driving circuit, and has a temperature sensing unit, a gamma voltage generating unit, a first compensation unit and a signal processing unit. The temperature sensing unit outputs a control signal. The gamma voltage generating unit generates a gamma voltage signal. The first compensation unit is electrically connected to the temperature sensing unit, and outputs a first compensation signal according to the control signal. The signal processing unit is electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit, and adjusts the level of the gamma voltage signal according to the control signal and the first compensation signal.

To achieve the above object, the present invention provides a control method of a display device. The display device has a display module, and the display module has a display panel, a data driving circuit, a timing control circuit and a voltage compensation circuit. The data driving circuit is electrically connected to the display panel via the plurality of data lines, and the timing control circuit is electrically connected to the data driving circuit. The voltage compensation circuit is electrically connected to the data driving circuit, and has a temperature sensing unit, a gamma voltage generating unit, a first compensation unit and a signal processing unit. The first compensation unit is electrically connected to the temperature sensing unit, and the signal processing unit is electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit. The control method of the display device includes the following steps: outputting a control signal by the temperature sensing unit; generating a gamma voltage signal by the gamma voltage generating unit; outputting a first compensation signal according to the control signal by the first compensation unit; and processing by the signal The unit adjusts the level of the gamma voltage signal according to the control signal and the first compensation signal.

According to the present invention, a voltage compensation circuit, a display module, a display device, and a control method thereof are outputted by a temperature sensing unit by a temperature sensing unit, and the first compensation unit outputs a first signal according to the control signal. The signal is compensated, and the signal processing unit adjusts the level of the gamma voltage signal according to the control signal and the first compensation signal. The control signal is related to the ambient temperature, for example, the operating temperature of the display device or the working environment temperature of the display device. Therefore, the voltage compensation circuit, the display module, the display device and the control method thereof according to the present invention can dynamically compensate the feedthrough voltage according to the ambient temperature, thereby improving the feedthrough effect.

Hereinafter, a voltage compensation circuit, a display module, a display device, and a control method thereof according to a preferred embodiment of the present invention will be described with reference to related drawings.

Referring to FIG. 3, the display module 2 of the preferred embodiment of the present invention includes a voltage compensation circuit 3, a timing control circuit 4, a display panel 5, a data driving circuit 6, and a scan driving circuit 7.

The scan driving circuit 7 is electrically connected to the display panel 5 by the plurality of scanning lines S ₂₁ - S _2m , and the data driving circuit 6 is electrically connected to the display panel 5 by the plurality of data lines D ₂₁ - D _2n , and the voltage compensating circuit 3 And the timing control circuit 4 is electrically connected to the data driving circuit 6, respectively.

Referring to FIG. 4, the voltage compensation circuit 3 of the present embodiment includes a gamma voltage generating unit 31, a first compensation unit 32, a signal processing unit 33, and a temperature sensing unit 34. The first compensation unit 32, the signal processing unit 33, and the temperature sensing unit 34 are electrically connected to each other, and the gamma voltage generating unit 31 is electrically connected to the signal processing unit 33.

The gamma voltage generating unit 31 has complex resistors 311 ₁ to 311 _a and complex switches 312 ₁ to 312 _a-1 , where a is a positive integer greater than 1. One of the switches 312 ₁ to 312 _a-1 is electrically connected to each other. The resistors 311 ₁ - 311 _a are connected in series with each other, and the adjacent resistors 311 ₁ - 311 _a have a contact therebetween, which are electrically connected to the other ends of the corresponding switches 312 ₁ - 312 _{a -1} , respectively.

The first compensation unit 32 has a plurality of resistors 321 ₁ to 321 _b and a plurality of switches 322 ₁ to 322 _b-1 , wherein b is a positive integer greater than one. One ends of the switches 322 ₁ to 322 _b-1 are electrically connected to each other. The resistors 321 ₁ - 321 _b are connected in series with each other, and the adjacent resistors 321 ₁ - 321 _b have a contact therebetween, which are electrically connected to the other ends of the corresponding switches 322 ₁ - 322 _b-1 , respectively.

The temperature sensing unit 34 includes a temperature sensor 341, an analog-to-digital converter 342, and a digital analog converter 343. The analog digital converter 342 is electrically connected to the temperature sensor 341 and the digital analog converter 343, respectively. The temperature sensor 341 outputs a temperature sensing signal S ₁ according to an ambient temperature, wherein the ambient temperature is, for example, an operating temperature of the display panel 5 or a working environment temperature of the display module 2, and the like.

The analog-to-digital converter 342 outputs a control signal S ₃ according to the temperature sensing signal S ₁ , which is a digital control signal S ₃ , and transmits it to the signal processing unit 33 and the digital analog converter 343 . Digital to analog converter system 343 according to the form of the digital control signal S ₃ output in analog form one of the control signal S _4, and transmits it to the first compensation unit 32.

In addition, the temperature sensing unit 34 of the embodiment has a first output terminal A ₁ and a second output terminal A ₂ . The first output terminal A ₁ is electrically connected to the signal processing unit 33 and the analog digital converter 342 , and the second output terminal A ₂ is electrically connected to the first compensation unit 32 and the digital analog converter 343 . In this embodiment, the first output terminal A ₁ is a digital output terminal, and the second output terminal A ₂ is an analog output terminal.

However, the analog-to-digital converter 342 and the digital-to-digital converter 343 of the present embodiment are not essential components. It is well known to those skilled in the art that when the analog-to-digital converter 342 and the digital analog converter 343 can be omitted, the temperature sensor 341 can be omitted. The temperature sensing unit 34 outputs the control signals S ₃ , S _{4 in} accordance with the ambient temperature. Here, the control signals S ₃ , S ₄ are control signals having the same form (analogous form or digital form). Hereinafter, the temperature sensing unit 34 is described by taking an analog digital converter 342 and a digital analog converter 343 as an example.

As shown in FIG. 4, the switches 322 ₁ - 322 _b-1 of this embodiment are turned on or off according to the analog signal S _{4 of the} analog form. The first compensation unit 32 outputs a first compensation signal S ₅ according to the on or off of the resistors 321 ₁ - 321 _b , the reference signal V ₃ , the reference signal V _{4 ,} and the switches 322 ₁ - 322 _{b - 1} , and outputs Transfer to the signal processing unit 33.

The switches 312 ₁ - 312 _a-1 of this embodiment are turned on or off according to a data signal S ₆ . The gamma voltage generating unit 31 outputs a gamma voltage signal S ₇ according to the on or off of the resistors 311 ₁ - 311 _a , the reference signal V ₁ , the reference signal V _{2 ,} and the switches 312 ₁ - 312 _a-1 , and outputs a gamma voltage signal S ₇ It is sent to the signal processing unit 33.

Referring to FIG. 3 and FIG. 4 simultaneously, the timing control circuit transmits an image signal S ₈ to the data driving circuit 6. The image data S ₈ may have at least one positive image data or at least one negative image data. Here, the voltage of the positive image data is greater than a common voltage, and the voltage of the negative image data is less than the common voltage.

At this time, the signal processing unit 33 can adjust the level of the gamma voltage signal S ₇ according to the control signal S ₃ and the first compensation signal S ₅ and the timing control circuit 4 to transmit the positive image data or the negative image data. . In addition, the control signal S ₃ is related to the ambient temperature. The display module 2 of the embodiment can dynamically compensate the feedthrough voltage according to the ambient temperature, thereby improving the feedthrough effect to improve the display quality.

As shown in FIG. 5, the temperature sensing unit 34 of the present embodiment further includes a memory component 344 electrically connected to the analog digital converter 342 and the digital analog converter 343, respectively. The memory element 344 has a look up table (LUT) that is a relationship between the stored ambient temperature and one of the corresponding grayscale offset values. In this embodiment, the ambient temperature is configured with a gray scale compensation value, for example, but not limited to, 0° to 60°, and within a temperature range of the environment, for example, but not limited to 10°, at intervals of one temperature.

In this embodiment, the temperature sensor 341 outputs a temperature sensing signal S ₁ according to an ambient temperature, and the analog digital converter 342 outputs the control signal S ₃ according to the temperature sensing signal S ₁ . In this case, the memory element 344 according to the control signal lines S ₃ via the look-up table to output a gray level compensation value, digital to analog converter system 343 according to the control signal output gray level compensation value S _4, respectively, to turn on or off the switch 322 ₁ ~ 322 _{b -1} , causing the first compensation unit 32 to output the first compensation signal S ₅ . The signal processing unit 33 can adjust the level of the gamma voltage signal S ₇ according to the control signal S ₃ and the first compensation signal S ₅ and the timing control circuit 4 to transmit the positive image data or the negative image data. The feedthrough effect of the display panel 5.

Referring to FIG. 6 , the display module 3 of the embodiment further includes a multiplex unit 35 and a second compensation unit 36 . The second compensation unit 36 is electrically connected to the temperature sensing unit 34 and the multiplex unit 35, and the first compensation unit 32 is electrically connected to the multiplex unit 35.

The second compensation unit 36 has complex resistors 361 ₁ - 361 _c and complex switches 362 ₁ - 362 _c-1 , where c is a positive integer greater than one. One of the switches 362 ₁ to 362 _c-1 is electrically connected to each other. The resistors 361 ₁ to 361 _c are connected in series with each other, and the adjacent resistors 361 ₁ to 361 _c have a contact therebetween, which are electrically connected to the other ends of the corresponding switches 362 ₁ to 362 _c-1 , respectively.

In the present embodiment, the switches 362 ₁ - 362 _c-1 are turned on or off according to the analog signal S _{4 of the} analog form. The second compensation unit 36 outputs a second compensation signal S ₉ according to the on or off of the resistors 361 ₁ - 361 _c , the reference signal V ₅ , the reference signal V _{6 ,} and the switches 362 ₁ - 362 _c-1 , and outputs Transfer to the multiplex unit 35.

At this time, the multiplex unit 35 transmits the first compensation signal S ₅ or the second compensation signal S ₉ to the signal processing unit 33 according to the control signal S ₄ . The signal processing unit 33 can adjust the level of the gamma voltage signal S ₇ according to the control signal S ₃ and the first compensation signal S ₅ and the timing control circuit 4 to transmit the positive image data or the negative image data. The feedthrough effect of the display panel 5.

Referring to FIG. 7, a control method of a display module according to a preferred embodiment of the present invention includes steps W11 to W14. The control method of the display module can be applied to the display module 3 of the above embodiment.

In step W11, a control signal is outputted by the temperature sensing unit. In step W12, a gamma voltage signal is generated by the gamma voltage generating unit. In step W13, the first compensation unit outputs a first compensation signal according to the control signal. In step W14, the signal processing unit adjusts the level of the gamma voltage signal according to the control signal and the first compensation signal.

The detailed control method has been described in detail in the above embodiments, and thus will not be further described herein. In addition, in the present embodiment, the control method of the voltage compensation circuit and the control method of the display device are the same as the control method of the display module described above, and details are not described herein again.

In addition, a display device according to a preferred embodiment of the present invention includes a display module having a display panel, a data driving circuit, a timing control circuit, and a voltage compensation circuit. The data driving circuit is electrically connected to the display panel via a plurality of data lines. The timing control circuit is electrically connected to the data driving circuit. The voltage compensation circuit is electrically connected to the data driving circuit, and has a temperature sensing unit, a gamma voltage generating unit, a first compensation unit and a signal processing unit. The temperature sensing unit outputs a control signal. The gamma voltage generating unit generates a gamma voltage signal. The first compensation unit is electrically connected to the temperature sensing unit, and outputs a first compensation signal according to the control signal. The signal processing unit is electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit, and adjusts the level of the gamma voltage signal according to the control signal and the first compensation signal. Since the characteristics of the voltage compensation circuit have been described in detail above, they will not be described again.

In summary, according to the present invention, a voltage compensation circuit, a display module, a display device, and a control method thereof are outputted by a temperature sensing unit, and the first compensation unit outputs a first signal according to the control signal. The signal is compensated, and the signal processing unit adjusts the level of the gamma voltage signal according to the control signal and the first compensation signal. The control signal is related to the ambient temperature, for example, the operating temperature of the display device or the working environment temperature of the display device. Therefore, the voltage compensation circuit, the display module, the display device and the control method thereof according to the present invention can dynamically compensate the feedthrough voltage according to the ambient temperature, thereby improving the feedthrough effect. In addition, the voltage compensation circuit, the display module and the display device of the present invention can further add a consideration parameter of the influence of the voltage on the liquid crystal molecules by using the comparison table to accurately improve the feedthrough effect.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1. . . Pixel

2. . . Display module

3. . . Voltage compensation circuit

31. . . Gamma voltage generating unit

311 ₁ ~ 311 _a . . . resistance

312 ₁ to 312 _a-1 . . . switch

32‧‧‧ a first compensation unit

321 ₁ ~ 321 _b ‧ ‧ resistance

322 ₁ ~ 322 _b-1 ‧‧‧ Switch

33‧‧‧Signal Processing Unit

34‧‧‧Temperature sensing unit

341‧‧‧temperature sensor

342‧‧‧ Analog Digital Converter

343‧‧‧Digital Analog Converter

344‧‧‧ memory components

35‧‧‧Multiple units

36‧‧‧Second compensation unit

361 ₁ ~ 361 _c ‧ ‧ resistance

362 ₁ ~ 362 _c-1 ‧‧‧ Switch

4‧‧‧Sequence Control Circuit

5‧‧‧ display panel

6‧‧‧Data Drive Circuit

7‧‧‧Scan drive circuit

A ₁ ‧‧‧first output

A ₂ ‧‧‧second output

C _GD ‧‧‧Parasitic capacitance

C _LC ‧‧‧Liquid Crystal Capacitor

C _ST ‧‧‧ storage capacitor

D ₁₁ , D ₂₁ ~D _2n ‧‧‧ data line

D1, d2‧‧‧ distance

L ₁ , L ₂ ‧‧ ‧ position

S ₁₁ , S ₂₁ ~S _2m ‧‧‧ scan line

S ₁ ‧‧‧temperature sensing signal

S ₃ , S ₄ ‧‧‧ control signals

S ₅ ‧‧‧First compensation signal

S ₆ ‧‧‧Information Signal

S ₇ ‧‧‧ gamma voltage signal

S ₈ ‧‧‧ video signal

S ₉ ‧‧‧second compensation signal

T ₁ ‧‧‧O crystal

t ₁ , t ₂ , t ₃ , t ₄ ‧‧‧ time

V ₁ ~V ₆ ‧‧‧ reference signal

V _COM ‧‧‧Common voltage

△V _P , △V _n ‧‧‧ feedthrough voltage

W11~W14‧‧‧Steps

Figure 1 is a schematic view of a conventional pixel;

2 is a waveform of a voltage of the pixel in FIG. 1;

3 is a schematic diagram of a display module according to a preferred embodiment of the present invention;

4 to 6 are views of an embodiment of the voltage compensation circuit of FIG. 3;

FIG. 7 is a flow chart showing the steps of a method for controlling a display module according to a preferred embodiment of the present invention.

3. . . Voltage compensation circuit

31. . . Gamma voltage generating unit

311 ₁ ~ 311 _a . . . resistance

312 ₁ to 312 _a-1 . . . switch

32. . . First compensation unit

321 ₁ ~ 321 _b . . . resistance

322 ₁ to 322 _b-1 . . . switch

33. . . Signal processing unit

34. . . Temperature sensing unit

341. . . Temperature sensor

342. . . Analog digital converter

343. . . Digital analog converter

A ₁ . . . First output

A ₂ . . . Second output

S ₁ . . . Temperature sensing signal

S ₃ , S ₄ . . . Control signal

S ₅ . . . First compensation signal

S ₆ . . . Data signal

S ₇ . . . Gamma voltage signal

V ₁ ~ V ₄ . . . Reference signal

Claims (33)

A voltage compensation circuit includes: a temperature sensing unit that outputs a control signal; a gamma voltage generating unit that generates a gamma voltage signal; and a first compensation unit that is electrically connected to the temperature sensing unit and is The control signal outputs a first compensation signal; and a signal processing unit is electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit, and according to the control signal and the first compensation signal Adjust the level of the gamma voltage signal. The voltage compensation circuit of claim 1, wherein the temperature sensing unit has a first output end and a second output end, and the first output end and the second output end respectively correspond to the signal processing unit And the first compensation unit is electrically connected. The voltage compensation circuit of claim 2, wherein the temperature sensing unit comprises: a temperature sensor that outputs a temperature sensing signal according to an ambient temperature; and an analog digital converter, respectively The output end and the temperature sensor are electrically connected, and the control signal is in the form of a digital output signal according to the temperature sensing signal; and a digital analog converter is electrically connected to the second output end and the analog digital converter respectively And according to the temperature sensing signal output analog control form of the control signal. a voltage compensation circuit as described in claim 3, wherein the The temperature sensing unit further includes: a memory component electrically connected to the analog-to-digital converter and the digital analog converter, and having a comparison table for storing the ambient temperature and one of the corresponding gray scales Relationship between. The voltage compensation circuit of claim 1, wherein the temperature sensing unit has a temperature sensor that outputs the control signal according to an ambient temperature. The voltage compensation circuit of claim 1, wherein the gamma voltage generating unit has: a plurality of switches, one of the switches is electrically connected to each other, and is turned on or off according to a data signal; and the plurality of resistors The contacts are connected in series with each other, and the contacts adjacent to the resistors are electrically connected to the other ends of the corresponding switches. The voltage compensation circuit of claim 1, wherein the first compensation unit has: a plurality of switches, one of the switches is electrically connected to each other, and is turned on or off according to the control signal; and a plurality of resistors, The contacts are connected in series with each other, and the contacts adjacent to the resistors are electrically connected to the other ends of the corresponding switches. The voltage compensation circuit of claim 1, further comprising: a second compensation unit electrically connected to the temperature sensing unit and outputting a second compensation signal according to the control signal; and a multiplexing unit And electrically connected to the temperature sensing unit, the first compensation unit, the second compensation unit, and the signal processing unit, and according to the The control signal outputs the first compensation signal or the second compensation signal. The voltage compensation circuit of claim 8, wherein the second compensation unit comprises: a plurality of switches, one of the switches is electrically connected to each other, and is turned on or off according to the control signal; and a plurality of resistors, The contacts are connected in series with each other, and the contacts adjacent to the resistors are electrically connected to the other ends of the corresponding switches. A display module includes: a display panel; a data driving circuit electrically connected to the display panel via a plurality of data lines; a timing control circuit electrically connected to the data driving circuit; and a voltage compensation circuit, and the The data driving circuit is electrically connected, and has: a temperature sensing unit that outputs a control signal; a gamma voltage generating unit that generates a gamma voltage signal; and a first compensation unit electrically connected to the temperature sensing unit And outputting a first compensation signal according to the control signal; and a signal processing unit electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit, and according to the control signal and the first A compensation signal adjusts the level of the gamma voltage signal. The display module of claim 10, wherein the temperature sensing unit has a first output end and a second output end, the An output terminal and the second output terminal are electrically connected to the signal processing unit and the first compensation unit, respectively. The display module of claim 11, wherein the temperature sensing unit comprises: a temperature sensor that outputs a temperature sensing signal according to an ambient temperature; and an analog-to-digital converter, respectively The output end and the temperature sensor are electrically connected, and the control signal is in the form of a digital output signal according to the temperature sensing signal; and a digital analog converter is electrically connected to the second output end and the analog digital converter respectively And according to the temperature sensing signal output analog control form of the control signal. The display module of claim 12, wherein the temperature sensing unit further comprises: a memory component electrically connected to the analog-to-digital converter and the digital analog converter, and having a look-up table The relationship between the ambient temperature and the voltage of one of the corresponding gray scales is stored. The display module of claim 10, wherein the temperature sensing unit has a temperature sensor that outputs the control signal according to an ambient temperature. The display module of claim 10, wherein the gamma voltage generating unit has: a plurality of switches, one of the switches is electrically connected to each other, and is turned on or off according to a data signal; and a plurality of resistors , the series are connected in series, and the contacts of the adjacent resistors are The other end of each of the corresponding switches is electrically connected. The display module of claim 10, wherein the first compensation unit has: a plurality of switches, one of the switches is electrically connected to each other, and is turned on or off according to the temperature sensing signal; The resistors are connected in series with each other, and the contacts adjacent to the resistors are electrically connected to the other ends of the corresponding switches. The display module of claim 10, wherein the voltage compensation circuit further comprises: a second compensation unit electrically connected to the temperature sensing unit, and outputting a second compensation signal according to the control signal; And the multiplex unit is electrically connected to the temperature sensing unit, the signal conversion unit, the first compensation unit, the second compensation unit, and the signal processing unit, and outputs the first compensation signal according to the control signal or The second compensation signal. The display module of claim 17, wherein the second compensation unit comprises: a plurality of switches, one of the switches is electrically connected to each other, and is turned on or off according to the control signal; and a plurality of resistors, The contacts are connected in series with each other, and the contacts adjacent to the resistors are electrically connected to the other ends of the corresponding switches. A display device includes: a display module having: a display panel; a data driving circuit electrically connected to the display panel via a plurality of data lines; a timing control circuit electrically connected to the data driving circuit; and a voltage compensation circuit electrically connected to the data driving circuit and having: The temperature sensing unit outputs a control signal; a gamma voltage generating unit generates a gamma voltage signal; a first compensation unit is electrically connected to the temperature sensing unit, and outputs a first compensation according to the control signal And a signal processing unit electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit, and adjusting the gamma voltage signal according to the control signal and the first compensation signal Bit. The display device of claim 19, wherein the temperature sensing unit has a first output end and a second output end, and the first output end and the second output end respectively correspond to the signal processing unit and The first compensation unit is electrically connected. The display device of claim 20, wherein the temperature sensing unit further comprises: a temperature sensor that outputs a temperature sensing signal according to an ambient temperature; and an analog-to-digital converter, respectively The output end and the temperature sensor are electrically connected, and the control signal is outputted according to the temperature sensing signal; and A digital analog converter is electrically connected to the second output end and the analog digital converter, and outputs the analog signal according to the analog sensing signal output form. The display device of claim 21, wherein the temperature sensing unit further comprises: a memory component electrically connected to the analog-to-digital converter and the digital analog converter, and having a look-up table The relationship between the ambient temperature and the voltage of one of the corresponding gray scales is stored. The display device of claim 19, wherein the temperature sensing unit has a temperature sensor that outputs the control signal according to an ambient temperature. The display device of claim 19, wherein the gamma voltage generating unit has: a plurality of switches, one of the switches is electrically connected to each other, and is turned on or off according to a data signal; and a plurality of resistors, The contacts are connected in series with each other, and the contacts adjacent to the resistors are electrically connected to the other ends of the corresponding switches. The display device of claim 19, wherein the first compensation unit has: a plurality of switches, one of the switches is electrically connected to each other, and is turned on or off according to the temperature sensing signal; and the plurality of resistors The contacts are connected in series with each other, and the contacts adjacent to the resistors are electrically connected to the other ends of the corresponding switches. The display device according to claim 19, wherein the electric device The voltage compensation circuit further includes: a second compensation unit electrically connected to the temperature sensing unit, and outputting a second compensation signal according to the control signal; and a multiplexing unit, the temperature sensing unit, and the signal conversion The unit, the first compensation unit, the second compensation unit and the signal processing unit are electrically connected, and output the first compensation signal or the second compensation signal according to the control signal. The display device of claim 26, wherein the second compensation unit comprises: a plurality of switches, one of the switches is electrically connected to each other, and is turned on or off according to the control signal; and a plurality of resistors The contacts are connected in series, and the contacts adjacent to the resistors are electrically connected to the other ends of the corresponding switches. A voltage compensation circuit has a temperature sensing unit, a gamma voltage generating unit, a first compensation unit and a signal processing unit, and the first compensation unit and the temperature sensing unit are electrically Connected, the signal processing unit is electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit, the control method includes the following steps: outputting a control signal by the temperature sensing unit; The voltage generating unit generates a gamma voltage signal; the first compensation unit outputs a first compensation signal according to the control signal; and the signal processing unit is based on the control signal and the first compensation signal No. adjusts the level of the gamma voltage signal. The control method of claim 28, wherein the temperature sensing unit has a temperature sensor, the control method further comprising the step of: outputting the control signal by the temperature sensor according to an ambient temperature. A display module control method, the display module has a display panel, a data driving circuit, a timing control circuit and a voltage compensation circuit, and the data driving circuit is electrically connected to the display panel via a plurality of data lines, the timing The control circuit is electrically connected to the data driving circuit, and the voltage compensation circuit is electrically connected to the data driving circuit, and has a temperature sensing unit, a gamma voltage generating unit, a first compensation unit and a signal processing unit. The first compensation unit is electrically connected to the temperature sensing unit, and the signal processing unit is electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit, and the control method comprises the following steps: The temperature sensing unit outputs a control signal; the gamma voltage generating unit generates a gamma voltage signal; the first compensation unit outputs a first compensation signal according to the control signal; and the signal processing unit controls the control according to the signal The signal and the first compensation signal adjust the level of the gamma voltage signal. The control method of claim 30, wherein the temperature sensing unit has a temperature sensor, and the control method further comprises the following steps: The temperature sensor outputs the control signal according to an ambient temperature. A display device having a display module, the display module having a display panel, a data driving circuit, a timing control circuit and a voltage compensation circuit, the data driving circuit and the plurality of data lines The display panel is electrically connected, the timing control circuit is electrically connected to the data driving circuit, the voltage compensation circuit is electrically connected to the data driving circuit, and has a temperature sensing unit, a gamma voltage generating unit, and a first a compensation unit and a signal processing unit, the first compensation unit is electrically connected to the temperature sensing unit, and the signal processing unit is electrically connected to the temperature sensing unit, the gamma voltage generating unit and the first compensation unit, The control method includes the following steps: outputting a control signal by the temperature sensing unit; generating a gamma voltage signal by the gamma voltage generating unit; and outputting a first compensation signal according to the control signal by the first compensation unit; The signal processing unit adjusts the level of the gamma voltage signal according to the control signal and the first compensation signal. The control method of claim 32, wherein the temperature sensing unit has a temperature sensor, the control method further comprising the step of: outputting the control signal by the temperature sensor according to an ambient temperature.