JP2006235452A - Display panel driving device, display device, differential transmission system and differential signal output device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce power consumption and noise of a liquid crystal panel driving device to which a differential transmission system such as RSDS is applied. <P>SOLUTION: A timing controller 10 of the driving device 120C includes a differential driver 13, a clock signal output unit 15 and a phase adjustor 16. The differential driver 13 is connected to one ends 21a, 22a of signal lines 21, 22 via two steps of inductors 41, 42 and inductance of the inductors 41, 42 is selected so that a differential signal DS which propagates the signal lines 21, 22 causes resonance. A termination resistor 30 is connected between the other ends 21b, 22b of the signal lines 21, 22. A differential receiver 53 is connected in the middle of the signal lines 21, 22. The phase adjuster 16 adjusts a phase of a clock signal C according to delay of the differential signal DS by the inductors 41, 42 and outputs the phase as a clock signal CB. The differential driver 13 outputs the differential signal DS synchronizing with the clock signal CB. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display panel driving device, a display device, a differential transmission system, and a differential signal output device, and more particularly to a technique for reducing power consumption and noise in the use of a differential signal.

  FIG. 8 is a block diagram for explaining a driving device 120P of a conventional liquid crystal display device. The driving device 120P supplies the source line driving signal and the gate line driving signal to the source line (also referred to as “data line”) and the gate line (also referred to as “scanning line”) of the liquid crystal panel (not shown). Drive and control. FIG. 8 schematically illustrates a portion related to generation and output of the source line drive signal in the drive device 120P.

  In the driving device 120P, the timing controller 10P generates and outputs a signal such as a clock signal and a display signal DSP based on an external signal (not shown). Since the display signal DSP is a differential signal, it is also referred to as a “differential signal DSP” using the same reference DSP. The differential signal DSP output from the timing controller 10P is transmitted to the source driver 50P via the two signal lines 21P and 22P forming a signal line pair.

  In particular, in the driving device 120P, one ends 21aP and 22aP of the signal lines 21P and 22P are connected to each other by a termination resistor 30aP, and the other ends 21bP and 22bP of the signal lines 21P and 22P are connected to each other by a termination resistor 30bP. The timing controller 10P and the plurality of source drivers 50P are connected to the signal lines 21P and 22P (that is, between the one end 21aP and 22aP and the other end 21bP and 22bP).

  Here, a configuration in which both ends of the signal lines 21P and 22P are terminated by termination resistors 30aP and 30bP, and a timing controller 10P corresponding to a signal output device is connected in the middle of the signal lines 21P and 22P is referred to as a “double termination method”. To do.

Each source driver 50P has a differential receiver (not shown) for receiving a differential signal DSP, and the source driver 50P generates a source line drive signal based on the display signal DSP to generate a source of the liquid crystal panel. Supply to the wire.
Japanese Patent Laid-Open No. 10-20837 JP 2004-102259 A

  As a method for generating and transmitting the differential signal DSP in the driving device 120P, for example, a reduced swing differential transmission method (RSDS), a low-amplitude differential signal method (LVDS), a mini-small size, and the like. An amplitude differential signal system (mini-LVDS) or the like is used. The signal amplitude in the conventional transmission system is 3.3 V, whereas in these differential transmission systems, the signal amplitude is set to 100 mV to 200 mV. Due to such a decrease in the amplitude signal, power consumption and electromagnetic interference noise (EMI) are reduced. (Electromagnetic Interference) noise) is considered to be reduced.

  However, it has been found that the effect of reducing power consumption and noise in the driving device 120P is actually insufficient.

  The present invention has been made in view of these points, and can reduce power consumption and noise. A display panel driving device, a display device, a differential transmission system, and a differential signal output device using a differential signal can be used. The purpose is to provide.

  In order to achieve the above object, a display panel driving device according to the present invention is a display panel driving device that is connected to a display panel and drives the display panel, the signal output device outputting a differential signal, and the difference A first signal line and a second signal line provided so that a motion signal is input from one end side, and a termination connected between the other end of the first signal line and the other end of the second signal line A resistor and at least one differential receiver connected to the first signal line and the second signal line between the one end and the other end to receive the differential signal are provided.

  In addition, at least one first inductor provided between the signal output unit and the one end of the first signal line, and between the signal output unit and the one end of the second signal line. And at least one stage of a second inductor, wherein the at least one stage of the first inductor and the at least one stage of the second inductor have an inductance that causes the differential signal to resonate.

  Further, the signal output device outputs the differential signal at a timing according to a delay of the differential signal by the at least one first inductor and the at least one second inductor.

  The at least one first inductor and the at least one second inductor may each be a two-stage inductor.

  Furthermore, the display device according to the present invention includes the display panel driving device and a display panel driven by being connected to the display panel driving device.

  Furthermore, the differential transmission system according to the present invention includes a signal output device that outputs a differential signal, a first signal line and a second signal line that are provided so that the differential signal is input from one end side, A termination resistor connected between the other end of the first signal line and the other end of the second signal line; and the first signal line and the second signal line between the one end and the other end. And at least one differential receiver connected to receive the differential signal.

  In addition, at least one first inductor provided between the signal output unit and the one end of the first signal line, and between the signal output unit and the one end of the second signal line. And at least one stage of a second inductor, wherein the at least one stage of the first inductor and the at least one stage of the second inductor have an inductance that causes the differential signal to resonate.

  Further, the signal output device outputs the differential signal at a timing according to a delay of the differential signal by the at least one first inductor and the at least one second inductor.

Further, the at least one first inductor and the at least one second inductor are each a two-stage inductor. Further, the differential signal output device according to the present invention outputs a differential signal. And at least one differential receiver for receiving the differential signal is connected between the one end and the other end. And a terminal resistor connected between the other end of the first signal line and the other end of the second signal line. And

  Furthermore, a differential signal output device according to the present invention includes at least one stage inductor, a signal output device that outputs a differential signal through the at least one stage inductor, and the differential signal input from one end side. And a first signal line and a second signal line provided such that at least one differential receiver for receiving the differential signal is connected between the one end and the other end. And a termination resistor connected between the other end of the first signal line and the other end of the second signal line.

  According to the first aspect of the present invention, the differential signal is input from one end side of the first signal line and the second signal line, and the other ends of the first signal line and the second signal line are terminated by the termination resistor ( Single termination method). For this reason, both ends of the signal line pair are terminated with termination resistors, and the load on the signal output unit is reduced as compared with a configuration in which the signal output unit is connected in the middle of the signal line pair (double termination type). By using the signal output device with the output adjustment function, the output of the signal output device can be reduced. As a result, the power consumption of the display panel driving device of the signal output device is reduced and the noise in the signal output device (EMI noise). It is possible to provide a display panel driving device capable of reducing the above.

  According to the invention of claim 2, since the differential signal resonates with the first inductor and the second inductor, the amplitude of the differential signal propagating through the first signal line and the second signal line is increased. For this reason, even if the output of the signal output device is lowered, a signal level that can be received by the differential receiver can be secured. Therefore, the power consumption and noise described above can be further reduced by such output reduction.

  According to the invention of claim 3, since the signal output device outputs the differential signal at a timing corresponding to the delay of the differential signal by the inductor, the delay of the differential signal is compensated. Therefore, even when the first inductor and the second inductor are applied, the differential signal can be appropriately transmitted and received.

  According to the invention of claim 4, a practical display panel drive device can be provided from the viewpoint of mounting area, cost, and the like.

  According to the invention of claim 5, the power consumption of the display device can be reduced by reducing the power consumption of the display panel driving device, and the display quality can be improved by reducing the noise of the display panel driving device.

  According to the invention of claim 6, a differential signal is inputted from one end side of the first signal line and the second signal line, and the other ends of the first signal line and the second signal line are terminated by the termination resistor ( Single termination method). For this reason, both ends of the signal line pair are terminated with termination resistors, and the load on the signal output unit is reduced as compared with a configuration in which the signal output unit is connected in the middle of the signal line pair (double termination type). By using the signal output device with the output adjustment function, the output of the signal output device can be reduced. As a result, the power consumption of the differential transmission system of the signal output device and the noise (EMI noise) of the signal output device are reduced. It is possible to provide a differential transmission system capable of reducing the above.

  According to the seventh aspect of the present invention, since the differential signal resonates with the first inductor and the second inductor, the amplitude of the differential signal propagating through the first signal line and the second signal line is increased. For this reason, even if the output of the signal output device is lowered, a signal level that can be received by the differential receiver can be secured. Therefore, the power consumption and noise described above can be further reduced by such output reduction.

  According to the eighth aspect of the invention, the signal output device outputs the differential signal at a timing corresponding to the delay of the differential signal by the inductor, so that the delay of the differential signal is compensated. Therefore, even when the first inductor and the second inductor are applied, the differential signal can be appropriately transmitted and received.

  According to the ninth aspect of the invention, a practical differential transmission system can be provided from the viewpoint of mounting area, cost, and the like.

  According to the invention of claim 10, the differential signal is input from one end side of the first signal line and the second signal line, and the other ends of the first signal line and the second signal line are terminated by the termination resistor ( Single termination method). For this reason, both ends of the signal line pair are terminated with termination resistors, and the load on the signal output unit is reduced as compared with a configuration in which the signal output unit is connected in the middle of the signal line pair (double termination type). By using the signal output device with the output adjustment function, the output of the signal output device can be reduced. As a result, the power consumption of the differential signal output device of the signal output device is reduced and the noise (EMI noise) in the signal output device is reduced. The differential signal output device can be provided.

  According to the invention of claim 11, since the signal output device includes the inductor, the board mounting area can be reduced, the board area can be reduced correspondingly, and the number of components can be reduced.

  As described above, according to the present invention, it is possible to reduce power consumption and noise in a display panel driving device, a display device, a differential transmission system, and a differential signal output device using a differential signal. In the display device, display quality is improved.

  Hereinafter, the best embodiment of the present invention will be described with reference to the drawings. However, the embodiments shown below exemplify a connection device for embodying the technical idea of the present invention, and are not intended to specify the present invention for this connection device. Other embodiments within the scope are equally applicable.

  FIG. 1 is a block diagram for explaining a liquid crystal display device 100 as a display device according to the first embodiment. As shown in FIG. 1, the liquid crystal display device 100 is roughly divided into a liquid crystal panel 110 as a display panel and a driving device 120 as a display panel driving device. The drive device 120 is connected to a source line (also referred to as “data line”) and a gate line (also referred to as “scan line”) (not shown) of the liquid crystal panel 110, and a source line drive signal SS is applied to the source line and the gate line. The liquid crystal panel 100 is driven and controlled by supplying the gate line drive signal GS.

  FIG. 2 is a block diagram for explaining the driving device 120. FIG. 2 schematically shows only the configuration necessary for the following description, and other configurations such as a gate driver for driving a gate line can be applied with known configurations. As shown in FIG. 2, the driving device 120 includes a timing controller 10 as a signal output device and a source driver group 5 including a plurality of source drivers 50.

  An external signal is input to the driving device 120 via an interface (not shown), and the timing controller 10 acquires a signal S and a clock signal C based on the external signal, and displays a display signal (or display data) DS or the like from the signal S. Generate and output a signal. The external signal includes, for example, a video signal, a horizontal synchronization signal, a vertical synchronization signal, and the like. For example, the signal S is extracted from the external signal by a circuit in the previous stage of the timing controller 10 or based on the external signal. Is generated. The timing controller 10 has a function of adjusting the output (output level) of various output signals.

  In particular, in the driving device 120, as a method of generating, outputting, and transmitting the display signal DS by the timing controller 10, for example, a reduced swing differential transmission method (RSDS), a small amplitude differential signal method (LVDS: Low). -Voltage Differential Signaling), mini-small amplitude differential signaling (mini-LVDS), etc. are used. For this reason, the display signal DS is also referred to as “differential signal DS” using the same symbol DS.

  The source driver 50 generates a source line drive signal SS of the liquid crystal panel 100 (see FIG. 1) based on the display signal DS, and drives the source line to which the source driver 50 is connected by the signal SS.

  FIG. 3 is a block diagram for explaining a differential transmission system 220 applied to the driving device 120.

  As shown in FIG. 3, the timing controller 10 includes a differential driver (or differential signal generator) 13 that generates and outputs a differential signal DS by using the above-described method such as RSDS, and a clock signal output unit. 15 and so on. The clock signal output unit 15 generates and outputs a clock signal based on the input clock signal C. For example, the differential driver 13 has a timing based on the clock signal generated by the clock signal output unit 15 ( Work in sync). In FIG. 3 and the like, such synchronization is schematically shown by a wide double-sided arrow shown between the differential driver 13 and the clock signal output unit 15.

  Each source driver 50 includes a differential receiver 53 that receives the differential signal DS. The differential receiver 53 can basically be configured by a differential amplifier, and is configured according to the method type of the differential driver 13, in other words, according to the method type of the differential signal DS.

  In particular, in the driving device 120, the differential transmission system 220 is applied to transmission / reception of the differential signal DS between the timing controller 10 and the source driver 50, and the differential transmission system 220 is a timing as a signal output device. The controller 10 includes a first signal line 21 and a second signal line 22 that form a signal line pair, a termination resistor 30, and a differential receiver 53 in each source driver 50.

  Specifically, one end 21 a of the first signal line 21 is connected to one output end (also an output end of the timing controller 10) 11 of the differential driver 13, and the other output end (timing) of the differential driver 13. One end 22 a of the second signal line 22 is connected to 12, which is also an output end of the controller 10. As a result, the differential signal DS is input to the first signal line 21 and the second signal line 22 from the one end 21a and the one end 22a side. On the other hand, a termination resistor 30 is connected between the other end 21 b of the first signal line 21 and the other end 22 b of the second signal line 22.

  The first signal line 21 is connected to one input end (also an input end of the source driver 50) 51 of the differential receiver 53 between the one end 21a and the other end 21b (that is, in the middle of the signal line 21). The second signal line 22 is between the one end 22a and the other end 22b (that is, in the middle of the signal line 22), the other input end of the differential receiver 53 (also the input end of the source driver 50) 52. It is connected to the. Thus, the differential receiver 53 of each source driver 50 is connected to the first signal line 21 and the second signal line 22 between the one end 21a, 22a and the other end 21b, 22b, and receives the differential signal DS.

  According to the differential transmission system 220 and the driving device 120 to which the differential transmission system 220 is applied, the differential signal DS is input from the one end 21 a of the first signal line 21 and the one end 22 a of the second signal line 22, and the first signal line 21. The other end 21b of the second signal line 22 and the other end 22b of the second signal line 22 are terminated by a termination resistor 30 (hereinafter referred to as “single termination method”). For this reason, compared with the drive device 120P to which the differential transmission system of the double termination system of FIG. Since the timing controller 10 has the output adjustment function as described above, the output of the timing controller 10 can be reduced. As a result, the power consumption of the timing controller 10 and the noise (EMI noise) of the timing controller 10 are reduced. ) Can be reduced.

  Therefore, the power consumption of the liquid crystal display device 100 can be reduced by reducing the power consumption of the timing controller 10 (in other words, the power consumption of the driving device 120), and the noise of the timing controller 10 (in other words, the driving device 120). The display quality of the liquid crystal display device can be improved by reducing noise.

FIG. 4 is a block diagram for explaining the drive device 120B according to the second embodiment and a differential transmission system 220B applied to the device 120B. The driving device 120B can be applied in place of the driving device 120 in the liquid crystal display device 100 of FIG.

  As can be seen from a comparison between FIG. 4 and FIG. 3 described above, the drive device 120B of FIG. 4 is the same as the drive device 120 of FIG. 3, except that the timing controller 10 is replaced with the timing controller 10B, and The second inductor 42 is added, and the rest of the configuration is the same as that of the driving device 120 of FIG. At this time, the differential transmission system 220B applied to the driving device 120B includes a timing controller 10B as a signal output device, the first signal line 21 and the second signal line 22, the termination resistor 30, and each source driver 50. Differential receiver 53, and first and second inductors 41 and 42.

  Specifically, as shown in FIG. 4, the timing controller 10B includes the differential driver 13 as in the timing controller 10 of FIG. 3, but the output terminal of the differential driver 13 (also the output terminal of the timing controller 10B). ) 11 and the first end 21a of the first signal line 21 is provided with a first inductor 41. That is, the output terminal 11 of the differential driver 13 is connected to the one end 21 a of the first signal line 21 via the first inductor 41. Similarly, a second inductor 42 is provided between the output terminal 12 of the differential driver 13 (which is also the output terminal of the timing controller 10 </ b> B) and the one end 22 a of the second signal line 22. The end 12 is connected to the one end 22 a of the second signal line 22 via the second inductor 42.

  In particular, the inductances of the first inductor 41 and the second inductor 42 have high impedance in the drive frequency band of the differential driver 13, and the differential signal DS propagating through the first signal line 21 and the second signal line 22 causes resonance. It is selected as follows. In addition, the peak of the signal waveform in which overshoot and undershoot have occurred due to resonance is selected so as to exceed the input threshold value (for example, ± 100 mV) of the differential receiver 53.

  According to the differential transmission system 220 </ b> B and the driving device 120 </ b> B to which the differential transmission system 220 </ b> B is applied, the differential signal DS resonates with the first inductor 41 and the second inductor 42, and thus propagates through the first signal line 21 and the second signal line 22. The amplitude of the differential signal DS to be increased. For this reason, even if the output of the timing controller 10B as a signal output device is lowered, it is possible to secure a signal level that can be received by the differential receiver 53. Therefore, by reducing the output of the timing controller 10B, it is possible to further reduce power consumption and noise compared to the differential transmission system 220 and the driving device 120 of FIG. And according to the liquid crystal display device 100 (see FIG. 1) to which the driving device 120B is applied, the power consumption can be reduced and the display quality can be further improved.

  By the way, the propagation of the differential signal DS is delayed due to the influence of the inductors 41 and 42, in other words, a timing shift occurs between the differential signal DS and the clock signal C. However, the differential transmission system 220B and therefore the driving device 120B are This delay compensation function is described below.

  The timing controller 10B includes a differential driver 13 and a clock signal output unit 15 that generate a differential signal (display signal) DS, similar to the timing controller 10 (see FIGS. 2 and 3) described above, and A phase adjuster 16 that receives the clock signal C, adjusts the phase of the signal C, and outputs the clock signal CB to the clock signal output unit 15 is included. Specifically, the phase adjuster 16 adjusts the phase of the clock signal C according to the delay of the differential signal DS by inserting the inductors 41 and 42 (more specifically, according to the delay of the differential signal DS). The clock signal CB is generated and output to the clock signal output unit 15 with a delay. Note that the phase adjustment amount can be set by, for example, setting in the phase adjuster 16 in advance.

  The clock signal output unit 15 receives the phase-adjusted clock signal CB, and the differential driver 13 outputs the differential signal DS at a timing based on the signal CB (synchronously). That is, the timing controller 10 outputs the differential signal DS at a timing corresponding to the delay of the differential signal DS by the inductors 41 and 42. According to the differential transmission system 220B and the driving device 120B, the delay due to the insertion of the inductors 41 and 42 is compensated in this way. Therefore, even if the inductors 41 and 42 are applied, the differential signal DS can be appropriately transmitted and received.

  In general, when an inductor is provided on a signal line, a signal delay occurs. Therefore, there is no idea or motivation to provide such an inductor in a differential transmission system such as RSDS. On the other hand, the present invention actively uses inductors for the differential transmission system 220B and the driving device 120B. That is, paying attention to the aspect of the resonance effect by the inductor, the differential signal DS is intentionally caused to resonate by the inductor, and the waveform overshoot and undershoot due to this resonance are actively used. In addition, the differential transmission system 220B and the driving device 120B take measures against the above-described delay by providing compensation means. As described above, the differential transmission system 220B and the driving device 120B are significant in that the present invention is used as a useful technique without being limited to conventional general and fixed recognition. The common mode filter is used for removing noise while suppressing waveform distortion, and is not for causing resonance.

  Next, FIG. 5 is a block diagram for explaining another drive device 120C according to the second embodiment and a differential transmission system 220C applied to the device 120C. The driving device 120C can be applied in place of the driving device 120 in the liquid crystal display device 100 of FIG.

  As can be seen from a comparison between FIG. 5 and FIG. 4 described above, the drive device 120C in FIG. 5 has a configuration in which the first inductor 41 and the second inductor 42 in the drive device 120B in FIG. The rest of the configuration is the same as that of the driving device 120B of FIG. At this time, the inductances of the two-stage first inductor 41 and the two-stage second inductor 42 are the differential signals DS propagating through the first signal line 21 and the second signal line 22 in the same manner as in the driving device 120B of FIG. Is selected to cause resonance. At this time, the differential transmission system 220C applied to the driving device 120C includes the timing controller 10B as a signal output device, the first signal line 21 and the second signal line 22, the termination resistor 30, and each source driver 50. Differential receiver 53, two-stage first inductor 41, and two-stage second inductor 42.

  According to the differential transmission system 220C and the drive device 120C to which the differential transmission system 220C is applied, the resonance increases as the number of stages of the inductors 41 and 42 increases. Therefore, the same effect as the case of the differential transmission system 220B and the drive device 120B is more remarkable. Is obtained. Each of the first inductor 41 and the second inductor 42 may have three or more stages. However, if the first inductor 41 and the second inductor 42 are two stages in particular, the driving device 120C can be configured practically in terms of mounting area, cost, and the like.

  In the first and second embodiments, the differential transmission systems 220, 220B, and 220C are applied to the driving devices 120, 120B, and 120C of the liquid crystal display device 100. However, not only the liquid crystal display device 100 but also other displays. The differential transmission systems 220, 220B, and 220C can be applied to a driving device such as a plasma display device. Furthermore, it goes without saying that the differential transmission systems 220, 220B, and 220C are not limited to the driving devices 120, 120B, and 120C of the display device, and can be applied to other various circuits and devices. The first signal line 21 and the second signal line 22 may be, for example, a wiring pattern on a printed board or the like, or may be a so-called cable line.

  FIG. 6 is a block diagram for explaining a differential signal output device 250C according to the third embodiment. As shown in FIG. 6, the differential signal output device 250C corresponds to a configuration in which the source driver 50 is removed from the configuration of the differential transmission system 220C shown in FIG. In other words, the combination of the differential signal output device 250C and the external differential receiver 53 corresponds to the above-described differential transmission system 220C. That is, the differential signal output device 250C includes a signal output device 10C having the same function as the timing controller 10B of FIGS. 4 and 5, the first signal line 21 and the second signal line 22, the termination resistor 30, and 2 A first inductor 41 in a stage and a second inductor 42 in a two stage are configured.

  Also with such a differential signal output device 250C, the same effect as the above-described differential transmission system 220C can be obtained.

  FIG. 7 is a block diagram for explaining another differential signal output device 250D according to the third embodiment. As shown in FIG. 7, the signal output device 10D of the differential signal output device 250D includes the signal output device 10C of the differential signal output device 250C of FIG. 6 described above, the two-stage first inductor 41, and the two-stage second inductor. Inductor 42 is included. At this time, the differential signal output device 250D includes the signal output device 10D, the first signal line 21, the second signal line 22, and the termination resistor 30.

  The differential signal output device 250D can be said to have the same configuration as the differential signal output device 250C in terms of individual elements. However, as described above, the signal output device 10D of the differential signal output device 250D is the signal output device 10C (FIG. 6). Reference) and the two-stage first inductor 41 and the two-stage second inductor 42, the board mounting area is reduced compared to the differential signal output device 250C, and the board area can be reduced accordingly. At the same time, the number of parts can be reduced.

  In the differential signal output devices 250C and 250D, the first inductor 41 and the second inductor 42 are respectively provided in one stage, thereby configuring a differential signal output device corresponding to the differential transmission system 220B (see FIG. 4). You can also. Also, by removing the first inductor 41 and the second inductor 42 from the differential signal output devices 250C and 250D, a differential signal output device corresponding to the differential transmission system 220 (see FIG. 3) can be configured.

1 is a block diagram for explaining a liquid crystal display device according to Embodiment 1. FIG. FIG. 3 is a block diagram for explaining a driving device of the liquid crystal display device according to the first embodiment. FIG. 3 is a block diagram for explaining a differential transmission system in the driving device of the liquid crystal display device according to the first embodiment. FIG. 5 is a block diagram for explaining a driving device of a liquid crystal display device according to a second embodiment. FIG. 10 is a block diagram for explaining another driving device of the liquid crystal display device according to the second embodiment. FIG. 10 is a block diagram for explaining a differential signal output device according to a third embodiment. FIG. 10 is a block diagram for explaining another differential signal output device according to the third embodiment. It is a block diagram for demonstrating the drive device of the conventional liquid crystal display device.

Explanation of symbols

10, 10B Timing controller (signal output device)
10C, 10D Signal output unit 13 Differential driver 15 Clock signal output unit 16 Phase adjuster 21 First signal line 22 Second signal line 21a, 22a One end 21b, 22b The other end 30 Termination resistor 41 First inductor 42 Second inductor 53 Differential receiver 100 Liquid crystal display device (display device)
110 Liquid crystal panel (display panel)
120, 120B, 120C drive device (display panel drive device)
220, 220B, 220C Differential transmission system 250C, 250D Differential signal output device C, CB Clock signal DS Display signal (differential signal)

Claims (11)

A display panel driving apparatus that is connected to a display panel and drives the display panel, a signal output unit that outputs a differential signal, and a first signal that is provided so that the differential signal is input from one end side. A first resistor between the one end and the other end, and a termination resistor connected between the other end of the first signal line and the other end of the second signal line. A display panel drive device comprising: at least one differential receiver connected to a line and the second signal line to receive the differential signal. At least one first inductor provided between the signal output unit and the one end of the first signal line; and at least provided between the signal output unit and the one end of the second signal line. 2. The apparatus according to claim 1, further comprising a second inductor of one stage, wherein the at least one first inductor and the at least one second inductor have an inductance that causes the differential signal to resonate. The display panel drive device described in 1. The signal output device outputs the differential signal at a timing corresponding to a delay of the differential signal by the at least one first inductor and the at least one second inductor. The display panel drive device described in 1. 4. The display panel driving device according to claim 2, wherein each of the at least one first inductor and the at least one second inductor is a two-stage inductor. 5. 5. A display device comprising: the display panel driving device according to claim 1; and a display panel connected to and driven by the display panel driving device. A signal output unit that outputs a differential signal; a first signal line and a second signal line provided so that the differential signal is input from one end side; the other end of the first signal line; and the second signal line A termination resistor connected between the other end of the signal line and at least one connected to the first signal line and the second signal line between the one end and the other end to receive the differential signal A differential transmission system comprising two differential receivers. At least one first inductor provided between the signal output unit and the one end of the first signal line; and at least provided between the signal output unit and the one end of the second signal line. 7. The apparatus according to claim 6, further comprising a second inductor of one stage, wherein the at least one first inductor and the at least one second inductor have an inductance that causes the differential signal to resonate. The differential transmission system described in. The signal output device outputs the differential signal at a timing corresponding to a delay of the differential signal by the at least one first inductor and the at least one second inductor. The differential transmission system described in. 9. The differential transmission system according to claim 7, wherein each of the at least one first inductor and the at least one second inductor is a two-stage inductor. A signal output unit that outputs a differential signal; and at least one differential that is provided so that the differential signal is input from one end side and receives the differential signal between the one end and the other end A termination resistor connected between the first signal line and the second signal line, and the other end of the first signal line and the other end of the second signal line, provided to be connected to a receiver. A differential signal output device comprising: A signal output device that includes at least one stage of inductor, and outputs a differential signal via the at least one stage of inductor; the differential signal is input from one end side; and the one end and the other A first signal line and a second signal line, and the other end of the first signal line, the second signal line, and the other end of the first signal line. A differential signal output device comprising a terminating resistor connected between the other end of the second signal line.

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