Display panel and display driver

Abstract

A display panel includes a display circuit, a conductive circuit, multiple sensing circuits and a display driver. The conductive circuit isconfigured to provide power to the display circuit. The sensing circuits are arranged in the display panel at a position corresponding to the display circuit, and the sensing circuits and the conductive circuit are formed of the same material. The display driver is coupled to the display circuit, the conductive circuit and the sensing circuits, and is configured to detect multiple sensing impedances of the sensing circuits to generate multiple compensation signals. The display driver is configured to control the display circuit according to the compensation signals.

Description

Technical Field

[0001] This disclosure relates to display technology, and in particular to a display panel and display driver. Prior Technology

[0002] With the rapid advancement of electronic technology, display panels have been widely used in people's lives, such as in smartphones and computers. Display panels control the brightness of each pixel based on image signals to present the corresponding image. However, due to undesirable factors such as temperature, transmission delay, or differences in component performance, the driving signals of display panels need to be compensated accordingly, and compensation technology directly affects the performance and quality of the display panel. Summary of the Invention

[0003] This disclosure relates to a display panel, comprising a display circuit, a transmission circuit, a plurality of sensing circuits, and a display driver. The transmission circuit supplies power to the display circuit. The sensing circuits are disposed in the display panel at positions corresponding to the display circuits, and are formed of the same material as the transmission circuit. The display driver is coupled to the display circuit, the transmission circuit, and the sensing circuits, and is used to detect a plurality of induced impedances of the sensing circuits to generate a plurality of compensation signals. The display driver controls the display circuit according to the compensation signals.

[0004] This disclosure also relates to a display driver, comprising a detection circuit, a conversion circuit, and a compensation circuit. The detection circuit is coupled to a plurality of sensing circuits in a display panel to detect a plurality of induced impedances of these sensing circuits. The sensing circuits and the transmission circuit in the display panel are formed of the same material, and the transmission circuit supplies power to the display circuit of the display panel. The conversion circuit is coupled to the detection circuit to calculate a plurality of detected temperature values ​​based on the induced impedances. The compensation circuit is coupled to the conversion circuit and the display circuit to generate a plurality of compensation signals based on the detected temperature values, and to control the display circuit based on these compensation signals.

[0005] This disclosure utilizes the special material properties of the sensing circuit within the display panel for temperature detection. It can detect temperature changes at various locations within the display panel without requiring additional manufacturing processes or occupying additional volume, effectively balancing product performance, cost, and size reduction. Simple Explanation of the Diagram

[0006] Figure 1 is a schematic diagram of a display panel according to a partial embodiment of the present disclosure. Figure 2 is a schematic diagram of a display driver according to some embodiments of the present disclosure. Figure 3A is a schematic diagram of a display panel according to a portion of the embodiments disclosed herein. Figure 3B is a schematic diagram of a detection unit according to some embodiments of the present disclosure. Figure 4A is a schematic diagram of a display panel according to some embodiments of the present disclosure. Figure 4B is a schematic diagram of a detection unit according to some embodiments of the present disclosure. Figure 4C is a partially enlarged schematic diagram of a display panel according to some embodiments of the present disclosure. Figure 5 is a partial circuit diagram of a display panel according to some embodiments of the present disclosure. Figure 6 is a partial circuit diagram of a display panel according to some embodiments of the present disclosure. Figure 7 is a schematic diagram of gamma curves according to some embodiments of the present disclosure. Implementation

[0007] The following drawings disclose several embodiments of the present invention. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and elements will be shown in the drawings in a simple schematic manner.

[0008] In this document, when an element is referred to as a "connection" or "coupled," it may mean an "electrical connection" or "electrical coupling." "Connection" or "coupled" can also be used to indicate the operation or interaction between two or more elements. Furthermore, although terms such as "first," "second," etc., are used herein to describe different elements, these terms are merely used to distinguish elements or operations described using the same technical terms. Unless the context clearly indicates otherwise, these terms do not specifically refer to or imply any order or sequence, nor are they intended to limit the invention.

[0009] With the advancement of display technology, high-speed operation applications of display panels are becoming increasingly common, and the electronic components within these panels are constantly being improved to enhance operation and response speed. However, with the advancement of electronic components, their sensitivity to temperature has also increased. To prevent different areas of the display panel from having different temperatures, which could affect the uniformity of the displayed image, the display panel can sense the temperature of different areas and compensate for the image based on the sensing results.

[0010] Figure 1 is a schematic diagram of an embodiment of a display panel 100 according to the present disclosure. The display panel 100 includes a display circuit 110, a transmission circuit 120, a display driver 130, and sensing circuits 140A-140D. The display circuit 110 includes a plurality of pixel units PX for displaying image frames. In one embodiment, the display circuit 110 may be a liquid crystal display (LCD), such as a thin-film transistor liquid crystal display (TFT-LCD). In other embodiments, the display circuit 110 may be an organic light-emitting diode (OLED) circuit or other types of display circuits. Since those skilled in the art can understand the internal structure and driving principle of display circuits, further details are omitted here.

[0011] The display driver 130 is coupled to the transmission circuit 120 and the sensing circuits 140A-140D, and is used to supply power and provide drive signals to the display circuit 110 through the transmission circuit 120. The sensing circuits 140A-140D are disposed in the display panel 100 at positions corresponding to the display circuit 110, such as adjacent to the edge of the display circuit 110 or partially overlapping with the display circuit 110. The sensing circuits 140A-140D are used to sense the temperature or temperature change at different locations on the display panel 100, and the display driver 130 compensates for the drive signals to be transmitted to the display circuit 110 based on the temperature or temperature change.

[0012] In this embodiment, the transmission circuit 120 and the sensing circuits 140A-140D are formed of the same material, such as indium tin oxide (ITO). Indium tin oxide has special material properties; the change in impedance value of the material has a predictable and specific relationship with the change in temperature. Therefore, the display driver 130 can estimate the temperature change by measuring the change in impedance value. In one embodiment, the display driver 130 first obtains the change in impedance value or voltage value from the sensing circuits 140A-140D, calculates the temperature value or the temperature change value, and then calculates the compensation signal by looking up a table or setting a characteristic formula.

[0013] For example, the display driver 130 adjusts the driving voltage supplied to the display circuit 110 according to the compensation signal to control the display circuit. Furthermore, the display driver 130 provides different driving voltages to different pixel units PX in different areas of the display circuit 110. In another embodiment, the display driver 130 adjusts the pixel value or grayscale value of the image signal according to the compensation signal.

[0014] This disclosure utilizes the thermal characteristics of sensing circuits 140A-140D in the display panel 100 for temperature sensing. By utilizing the impedance-temperature characteristic relationship, sensing circuits 140A-140D are arranged in different areas of the display panel 100 so that the display driver 130 can detect temperature changes at different locations.

[0015] The number and position of the sensing circuits 140A-140D can be adjusted as needed. In one embodiment, the sensing circuits 140A-140D are disposed in the display panel 100 at positions corresponding to the edges of the display circuit 110, for example, at the four corners adjacent to the display circuit 110. Depending on the multiple positions of the sensing circuits 140A-140D, the display driver 130 can divide the display circuit 110 into multiple regions for separate compensation. For example, if the sensing circuits 140A-140D are disposed at the four corners of the display circuit 110, the display panel 100 can be divided into at least four regions. The display driver 130 will determine the temperature of different regions based on the sensing circuits 140A-140D and generate different compensation signals.

[0016] In some embodiments, at least a portion of each sensing circuit 140A-140D is located within the active display area (AA area) of the display panel 100. The active display area is the area of ​​the display panel 100 used to display images; the area marked by the display circuit 110 in Figure 1 can be considered the active display area. In other embodiments, the sensing circuits 140A-140D may be entirely located within the active display area or entirely located outside the active display area.

[0017] In some embodiments, the display driver 130 may divide the display circuitry 110 into multiple regions "more than the number of sensing circuits," for example, dividing it into 25 regions, where the four corner regions correspond to one sensing circuit. The table below is a schematic table illustrating the division of the effective display area of ​​the display panel into multiple regions. The table contains 25 columns X11~X15, X21~X25, X31~X35, X41~X45, and X51~X55, with each column representing one region. X11 X12 X13 X14 X15 X21 X22 X23 X24 X25 X31 X32 X330 X34 X35 X41 X42 X43 X44 X45 X51 X52 X53 X54 X55

[0018] Please refer to the table above and Figure 1. The sensing circuits 140A-140D are located at the four corners of the effective display area. Therefore, based on the sensing impedance of the sensing circuits 140A-140D, the display driver 130 can calculate the temperatures of the four areas X11, X15, X51, and X54. The display driver 130 can use interpolation to calculate the temperatures of other areas to accurately compensate for different degrees of temperature in each area. Since those skilled in the art will understand the operation of interpolation, it will not be described further here.

[0019] In some embodiments, each sensing circuit 140A-140D includes an L-shaped wiring structure (Figure 1 is only a simplified schematic diagram; specific embodiments will be described in subsequent paragraphs and figures). The L-shaped wiring structure (pattern) is located in the effective display area of ​​the display panel 100.

[0020] As previously described, this disclosure utilizes the material properties of the sensing circuits 140A-140D within the display panel 100 for temperature detection. The sensing circuits 140A-140D can be fabricated in the same process as the transmission circuit 120, without needing to be connected to the display circuit 110, but can be easily formed / configured in different locations within the display panel 100 to facilitate accurate temperature detection, thereby enabling more precise compensation of the display driver 130.

[0021] Figure 2 is a schematic diagram of a display driver 130 according to some embodiments of the present disclosure. In some embodiments, the display driver 130 includes a detection circuit 131, a conversion circuit 132, and a compensation circuit 133. The detection circuit 131 is coupled to the sensing circuits 140A-140D to detect the sensing impedance of each sensing circuit 140A-140D respectively, and generates an impedance signal S31.

[0022] The conversion circuit 132 is coupled to the detection circuit 131 to receive the impedance signal S31. The conversion circuit 132 calculates the corresponding detection temperature value (e.g., 60 degrees Celsius) based on the induced impedance detected by the detection circuit 131, thereby generating the temperature signal S32. In one embodiment, the conversion circuit 132 stores temperature-impedance characteristic data for each sensing circuit 140A~140D, enabling the calculation of the detection temperature value using calculation or table lookup.

[0023] The compensation circuit 133 is coupled to the conversion circuit 132 and the display circuit 110. It generates a corresponding compensation signal S33 based on the detected temperature value calculated by the conversion circuit 132, and controls the display circuit 110 according to the compensation signal S33. For example, when it is determined that the temperature has increased, causing the brightness of the pixel unit PX to become more pronounced, the compensation circuit 133 can generate the compensation signal S33 to reduce the brightness in response to the temperature change. This "driving signal adjusted according to temperature change" is the compensation signal and can be used to adjust / update the original driving signal. In one embodiment, the compensation circuit 133 adjusts the duty cycle of the gamma value, pixel driving signal, or backlight control signal applied to the display panel 100 according to the compensation signal S33; details will be described in subsequent paragraphs.

[0024] In some embodiments, the display driver 130 further includes a driving circuit (not shown) coupled to the compensation circuit 133 to generate or adjust a driving signal according to the compensation signal S33 to control the rendering brightness of each pixel unit PX.

[0025] The following describes various embodiments of the sensing circuit and the method for determining the sensing impedance. Figure 3A is a schematic diagram of a display panel 300 according to some embodiments of this disclosure, which can be used to implement the display panel 100 shown in Figure 1. For the sake of simplicity, the display circuit and the conduction circuit are omitted in Figure 3A, and only the display driver 310 and the sensing circuits 320A to 320D in the conduction circuit are shown. In addition, the position of the effective display area AA is shown in Figure 3A to show the relative position of the sensing circuits 320A to 320D and the effective display area AA.

[0026] Referring to Figure 3A, in this embodiment, the lengths of each sensing circuit 320A-320D are substantially the same, and the wiring pattern can be symmetrical (e.g., left-right symmetrical). In other words, the wires coupled to the display driver 310 for each sensing circuit 320A-320D are of the same length. Under the same initial temperature conditions, each sensing circuit 320A-320D will have the same sensing impedance. Therefore, the display driver 310 does not need to calculate the "actual impedance value" of each sensing circuit 320A-320D, but can generate a corresponding compensation signal by judging the "change in sensing impedance" of each sensing circuit 320A-320D.

[0027] In some embodiments, the detection circuit of the display driver 310 (as shown in Figure 2) includes multiple detection units, each detection unit being used to detect a corresponding sensing circuit 320A-320D. Figure 3B is a schematic diagram of one of the detection units 330 in some embodiments according to this disclosure, used to detect the sensing impedance of the sensing circuit 333. The sensing circuit 333 may be any of the sensing circuits 140A-140D shown in Figure 1, or the sensing circuits 320A-320D shown in Figure 3A.

[0028] As shown in Figure 3B, the detection unit 330 includes a current detector 331 and a voltage detector 332. The current detector 331 is connected in parallel with the corresponding sensing circuit 333 and is used to provide a detection current. The voltage detector 332 is also connected in parallel with the corresponding sensing circuit 333 to detect the voltage across the sensing circuit 333. Based on the provided detection current and the detected voltage, the display driver 310 can calculate the impedance value of the sensing circuit 333.

[0029] In the embodiments shown in Figures 3A and 3B, since the lengths of the sensing circuits 320A to 320D are substantially the same, the "impedance change of the sensing impedance" of the sensing circuits 320A to 320D will not differ due to the "difference in wire length".

[0030] Figures 4A-4C are schematic diagrams of display panels with sensing circuits of different lengths. Figure 4A is a schematic diagram of the display panel 400 in a partial embodiment, Figure 4B is a schematic diagram of the detection unit 430 in a partial embodiment, and Figure 4C is a partial enlarged view of the display panel 400. Similar to Figure 3A, Figure 4A omits the display circuit and conductive circuit, only showing the display driver 410 and the sensing circuits 420A-420D in the conductive circuit.

[0031] Please refer to Figures 4A and 4B. Since the wires of sensing circuits 420A to 420D coupled to display driver 310 have different lengths, the sensing impedance detected by detection unit 430 will be affected by the wire length. For example, since the distance between sensing circuit 420D and display driver 410 is relatively far, the wire impedance between sensing circuit 420D and display driver 410 will affect the detection result and may not accurately reflect the regional temperature of the display area.

[0032] Continuing from the above, in order to detect the temperature of the area corresponding to the sensing circuit 420D, in this embodiment, the current detector 431 and voltage detector 432 included in the detection unit 430 are connected in parallel with the sensing circuit 433 in different circuits, so that the display driver 410 can calculate the impedance value of the sensing circuit 433. The sensing circuit 433 can be any of the sensing circuits 140A-140D shown in Figure 1, or the sensing circuits 320A-320D shown in Figure 3A.

[0033] As shown in Figure 4B, the current detector 431 provides current I41 through the first loop, while the voltage detector 432 detects the voltage across the sensing circuit 433 through the second loop. Since the impedance of the voltage detector 432 is much greater than that of the sensing circuit 433, almost all of the current I41 flows through the sensing circuit 433. In other words, the current I43 approaches zero, and the current I42 is equal to the current I41. Therefore, by connecting two different loops in parallel with the sensing circuit 433, the current and voltage of the sensing circuit 433 can be accurately obtained, and the impedance value of the sensing circuit 433 can be calculated without being affected by the impedance of other wires.

[0034] Referring to Figure 4C, in one embodiment, the sensing circuit (described here as inductive circuit 420B) may include a low-impedance path 421 and a high-impedance path 422. The low-impedance path 421 may be the first loop shown in Figure 4B, used to transmit current I41, i.e., to provide the induced current. The high-impedance path 422 may be the second loop shown in Figure 4B, used for voltage measurement, so the current I42 will be much smaller than the current I41.

[0035] The display panel disclosed herein can be applied to implement different types of displays, such as LCD panels or OLED panels. Figure 5 is a partial circuit diagram of a display panel 500 according to a partial embodiment of the present disclosure. As shown in Figure 5, the display panel 500 is an LCD panel, including a backlight circuit 510, a driving circuit 520, and pixel units PX. The backlight circuit 510 controls the current supplied to the backlight element according to the input voltage Vin and the control signal Spwm to control the brightness of the backlight.

[0036] The drive circuit 520 includes a gate driver 521, a gamma correction circuit 522, a digital-to-analog converter 523, and a source output circuit 524. The gate driver 521 (Gate Driver on Array, GOA) is used to drive the gate of the transistor switch T51 in the pixel unit PX according to the voltage signals VGH and VGL.

[0037] The gamma correction circuit 522 is used to correct the display effect of the pixel unit PX according to the node signal Snode and the positive reference voltage GVDDP and negative reference voltage GVDDN (e.g., change the gamma value or adjust the gamma curve) to ensure that the image meets the expected color and brightness.

[0038] The digital-to-analog converter 523 converts the data signal Sdata from digital format to analog format. The source driver on panel 524 is coupled to the digital-to-analog converter 523 and controls the source of the transistor switch in the pixel unit PX to provide the current required by the pixel unit PX. The voltage stored in capacitors C51 and C52 in the pixel unit PX corresponds to the pixel value and / or transmittance.

[0039] Figure 6 is a partial circuit diagram of a display panel 600 according to a partial embodiment of the present disclosure. The display panel 600 includes a driving circuit 610 and a pixel unit PX. In this embodiment, the display panel is an OLED panel, and the pixel unit PX determines the brightness generated based on the input voltage Vin and voltage signals ELVDD and ELVSS.

[0040] As shown in Figure 6, the drive circuit 610 includes a gate driver 611, a gamma correction circuit 612, a digital-to-analog converter 613, and a source output circuit 614. The gate driver 611 is used to drive the gates of transistor switches T61 and T62 in the pixel unit PX according to the voltage signals VGH and VGL, so as to control the current of the pixel unit PX.

[0041] The gamma correction circuit 612 is used to correct the display effect of the pixel unit PX according to the node signal Snode and the positive reference voltage VGMP and negative reference voltage VGSP (e.g., change the gamma value or adjust the gamma curve) to ensure that the image meets the expected color and brightness.

[0042] A digital-to-analog converter 613 is used to convert the data signal Sdata from digital format to analog format. A source output circuit 614 (coupled to the digital-to-analog converter 613) is used to control the source of the transistor switch T61 in the pixel unit PX. The voltage stored in the capacitor C61 in the pixel unit PX corresponds to the pixel value.

[0043] Depending on the type of display panel, the display driver can be compensated in different ways. As mentioned earlier, the "compensation signal" can be a drive signal adjustment value corresponding to different temperatures, such as the gamma value, pixel drive signal, or duty cycle of the backlight control signal. The gamma value can be determined by the aforementioned node signal Snode, positive reference voltage GVDDP / VGMP, or negative reference voltage GVDDN / VGSP. The pixel drive signal can be determined by the aforementioned voltage signals VGH / VGL, voltage signals ELVDD / ELVSS, or input voltage Vin. The duty cycle of the backlight control signal can be determined by the aforementioned control signal Spwm.

[0044] Figure 7 is a schematic diagram of a gamma curve 700 according to a partial embodiment of the present disclosure. The gamma curve 700 defines the relationship between the intensity of the input signal (e.g., pixel value) and the brightness of the output signal. Different gamma curves correspond to different gamma values. In one embodiment, the display driver can adjust the gamma curve by changing the gamma value. In other embodiments, the display driver can adjust the gamma curve / gamma value by setting different gamma voltage nodes 710 (the position of the gamma voltage node 710 in Figure 7 is only schematic; it can actually be set to correspond to any input signal intensity). A "gamma voltage node" is a reference voltage at a specific position in the gamma curve, which can be determined by the aforementioned node signal Snode. Therefore, by changing the node signal Snode at different positions, the gamma curve / gamma value can be adjusted.

[0045] The various components, method steps, or technical features in the foregoing embodiments can be combined with each other, and are not limited to the order of textual description or graphical presentation in this disclosure.

[0046] Although the present disclosure has been described above with reference to embodiments, it is not intended to limit the present disclosure. Anyone skilled in the art may make various modifications and alterations without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the claims defined in the appended patent application.

[0047] 100: Display panel 110: Display circuit 120: Transmission circuit 130: Display driver 131: Detection Circuit 132: Conversion Circuit 133: Compensation Circuit 140A: Induction Circuit 140B: Induction Circuit 140C: Induction Circuit 140D: Induction Circuit 300: Display panel 310: Display driver 320A: Induction Circuit 320B: Induction Circuit 320C: Induction Circuit 320D: Induction Circuit 330: Detection Unit 331: Current Detector 332: Voltage Detector 333: Induction Circuit 400: Display panel 410: Display driver 420A: Induction Circuit 420B: Induction Circuit 420C: Induction Circuit 420D: Induction Circuit 421: Low Impedance Path 422: High Impedance Path 430: Detection Unit 431: Current Detector 432: Voltage Detector 433: Induction Circuit 500: Display panel 510: Backlight Circuit 520: Drive circuit 521: Gate Driver 522: Gamma correction circuit 523: Digital-to-Analog Converter 524: Source Output Circuit 600: Display panel 610: Drive circuit 611: Gate Driver 612: Gamma correction circuit 613: Digital-to-Analog Converter 614: Source Output Circuit 700: Gamma Curve AA: Effective display area C51: Capacitor C52: Capacitor C61: Capacitor ELVDD: Voltage signal ELVSS: Voltage signal GVDDP: Positive Reference Voltage GVDDN: Negative Reference Voltage I41: Current I42: Current I43: Current PX: Pixel Unit S31: Impedance signal S32: Temperature signal S33: Compensation Signal Spwm: Control signal Snode: Node signal Sdata: Data Signal T51: Transistor Switch T61: Transistor Switch T62: Transistor Switch Vin: Input voltage VGH: Voltage signal VGL: Voltage signal VGMP: Positive Reference Voltage VGSP: Negative Reference Voltage

[0048] Domestic storage information (please note in order of storage institution, date, and number) none Overseas storage information (please note in the order of storage country, institution, date, and number) none

Claims

1. A display panel, comprising: a display circuit; a transmission circuit for supplying power to the display circuit; a plurality of sensing circuits disposed in the display panel at positions corresponding to the display circuit, wherein the sensing circuits and the transmission circuit are formed of indium tin oxide; and a display driver coupled to the display circuit, the transmission circuit and the sensing circuits, and for detecting a plurality of sensed impedances of the sensing circuits to generate a plurality of compensation signals, wherein the display driver controls the display circuit according to the compensation signals.

2. The display panel as claimed in claim 1, wherein the sensing circuits are disposed in the display panel at a plurality of locations corresponding to the edges of the display circuits.

3. The display panel as claimed in claim 2, wherein at least a portion of each of the sensing circuits is located within an effective display area of ​​the display panel.

4. The display panel as claimed in claim 3, wherein at least a portion of each of the sensing circuits includes an L-shaped wiring structure.

5. The display panel as described in claim 1, wherein the lengths of the sensing circuits are substantially the same.

6. The display panel as described in claim 5, wherein the display driver is used to determine changes in the sensed impedance in order to generate corresponding compensation signals.

7. The display panel as described in claim 5, wherein the wiring structure of the sensing circuits is symmetrical to each other.

8. The display panel as claimed in claim 1, wherein the display driver includes a current detector and a voltage detector, the current detector and the voltage detector being connected in parallel to one of the sensing circuits through different circuits, so that the display driver calculates the impedance value of one of the sensing circuits.

9. The display panel as claimed in claim 1, wherein the display driver is configured to adjust the duty cycle of a gamma value, a pixel drive signal, or a backlight control signal according to the compensation signals.

10. A display driver, comprising: a detection circuit coupled to a plurality of sensing circuits of a display panel for detecting a plurality of sensed impedances of the sensing circuits, wherein the sensing circuits and a transmission circuit in the display panel are formed of indium tin oxide, and the transmission circuit is used to supply power to a display circuit of the display panel; a conversion circuit coupled to the detection circuit for calculating a plurality of detected temperature values ​​based on the sensed impedances; and a compensation circuit coupled to the conversion circuit and the display circuit for generating a plurality of compensation signals based on the detected temperature values, and controlling the display circuit based on the compensation signals.

11. The display driver as claimed in claim 10, wherein the sensing circuits are disposed at a plurality of locations in the display panel corresponding to the edges of the display circuits.

12. The display driver as claimed in claim 11, wherein at least a portion of each of the sensing circuits is located within an effective display area of ​​the display panel.

13. The display driver as claimed in claim 12, wherein at least a portion of each of the sensing circuits includes an L-shaped wiring structure.

14. The display driver as described in claim 10, wherein the lengths of the sensing circuits are substantially the same.

15. The display driver as claimed in claim 14, wherein the detection circuitry is used to detect changes in each of the induced impedances to generate corresponding compensation signals.

16. The display driver as described in claim 14, wherein the wiring structure of the sensing circuits is mutually symmetrical.

17. The display driver as claimed in claim 10, wherein the detection circuit includes a current detector and a voltage detector, the current detector and the voltage detector being connected in parallel to one of the sensing circuits through different circuits, so that the detection circuit calculates the impedance value of one of the sensing circuits.

18. The display driver as claimed in claim 10, wherein the display driver is configured to adjust the duty cycle of a gamma value, a pixel drive signal, or a backlight control signal according to the compensation signals.

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