Scan-type display with short-circuit detection function and data device thereof

Abstract

A scanning display with short-circuit detection capability includes: a display device comprising a common-anode light-emitting diode array including multiple scan lines and multiple data lines; and a data device including multiple driving units. Each driving unit includes a current driving circuit and a detection circuit. The current driving circuit has an output terminal electrically connected to a corresponding data line, and is controlled by a pulse width control signal to generate one of a driving current and a first clamping voltage at the output terminal and output it to the corresponding data line. The detection circuit detects the voltage at the output terminal of the current driving circuit and generates a detection result indicating whether the corresponding data line is abnormal based on the voltage at the output terminal and a detection timing signal.

Description

TECHNICAL FIELD

[0001] The present invention relates to a display and a device, and particularly relates to a scanning display with short-circuit detection function and a data device thereof. BACKGROUND

[0002] The driving mode of the existing light emitting diode (LED) display can improve the ghost phenomenon and coupling problem of the known LED display, but at the same time, other problems are derived, such as short-circuit caterpillar phenomenon. It is further explained that the phenomenon of deriving discharge current caused by the discharge of the parasitic capacitance between the two poles of the LED and then making the corresponding LED emit light is called ghost phenomenon; the low-brightness area of the LED display array is affected by the high-brightness area, resulting in the problem of inconsistency of the brightness and color displayed by the LED display, which is called coupling problem; the short-circuit caterpillar phenomenon includes the constant-brightness caterpillar phenomenon and the constant-darkness caterpillar phenomenon, the constant-brightness caterpillar phenomenon refers to the constant brightness of the LED lamp string of the corresponding column due to the short circuit of one LED in one LED array of the LED display, and the constant-darkness caterpillar phenomenon refers to the constant darkness of the LED lamp string of the corresponding column due to the short circuit of the LED, the LED lamp string of the corresponding column is defined as a plurality of LEDs electrically connected corresponding to a data line of the LED display. In this way, the short-circuit caterpillar phenomenon will affect the display effect of the LED display, therefore, how to eliminate the short-circuit caterpillar phenomenon is a problem that needs to be solved urgently. SUMMARY

[0003] One object of the present invention is to provide a scanning display with short-circuit detection function which can overcome the disadvantages of the prior art.

[0004] The scanning display with short-circuit detection function of the present invention comprises a display device and a data device.

[0005] The display device comprises a common anode architecture light emitting diode array, the light emitting diode array comprises a plurality of scan lines, a plurality of data lines, and a plurality of light emitting diodes.

[0006] The scan lines are arranged along a row direction.

[0007] The data lines are arranged perpendicularly to the scan lines along a column direction.

[0008] The light emitting diodes are arranged in a matrix defined by the scan lines and the data lines, respectively, each light emitting diode has an anode electrically connected to the corresponding scan line and a cathode electrically connected to the corresponding data line.

[0009] The data device includes a plurality of driving units, each of which includes a current driving circuit and a detecting circuit.

[0010] The current driving circuit has an output terminal electrically connected to a corresponding data line of the data lines, and generates one of a driving current and a first clamp voltage at the output terminal and outputs to the corresponding data line under the control of a pulse width control signal.

[0011] The detecting circuit receives a detecting timing signal, detects the voltage at the output terminal of the current driving circuit, and generates a detecting result indicating whether the corresponding data line is abnormal according to the voltage at the output terminal and the detecting timing signal.

[0012] The scanning display with short circuit detecting function of the present application, in each driving unit, the detecting circuit includes,

[0013] a comparator having a first input terminal for detecting the voltage at the output terminal of the current driving circuit, a second input terminal receiving a predetermined reference voltage, and an output terminal providing a comparison result of the comparison between the voltage at the output terminal and the predetermined reference voltage, and

[0014] a logic gate having a first input terminal electrically connected to the comparator for receiving the comparison result, a second input terminal receiving the detecting timing signal, and an output terminal, the logic gate generating the detecting result at the output terminal of the logic gate according to the comparison result and the detecting timing signal.

[0015] The scanning display with short circuit detecting function of the present application, in each driving unit, the detecting circuit is electrically connected to the output terminal of the current driving circuit for detecting the voltage at the output terminal, and the current driving circuit includes,

[0016] a voltage stabilizer generating the first clamp voltage,

[0017] an inverter receiving the pulse width control signal and generating an inverted signal according to the pulse width control signal,

[0018] a constant current generator generating the driving current,

[0019] a first switch having a first terminal electrically connected to the output terminal of the current driving circuit, and a second terminal electrically connected to the constant current generator for receiving the driving current, the first switch being controlled by the pulse width control signal to be turned on or off, and outputting the driving current to the corresponding data line when turned on, and

[0020] a second switch having a first terminal electrically connected to the voltage stabilizer to receive the first clamp voltage and a second terminal electrically connected to the output terminal of the current driving circuit, the second switch being controlled by the inverted signal to be turned on or off, and outputting the first clamp voltage to the corresponding data line when turned on.

[0021] The scanning display with short-circuit detection function of the present application, in each driving unit, the current driving circuit includes,

[0022] a voltage stabilizer generating the first clamp voltage,

[0023] an inverter receiving the pulse width control signal and generating an inverted signal according to the pulse width control signal,

[0024] a constant current generator electrically connected to the detection circuit and generating the driving current,

[0025] a first switch having a first terminal electrically connected to the output terminal of the current driving circuit and a second terminal electrically connected to the detection circuit and the constant current generator to receive the driving current, the first switch being controlled by the pulse width control signal to be turned on or off, and outputting the driving current to the corresponding data line when the first switch is turned on, and the detection circuit detecting the voltage of the output terminal of the current driving circuit through the first switch, and

[0026] a second switch having a first terminal electrically connected to the voltage stabilizer to receive the first clamp voltage and a second terminal electrically connected to the output terminal of the current driving circuit, the second switch being controlled by the inverted signal to be turned on or off, and outputting the first clamp voltage to the corresponding data line when turned on.

[0027] The scanning display with short-circuit detection function of the present application further comprises scanning devices, the scanning devices include

[0028] a scan control unit generating a plurality of scan signals and a plurality of clamp signals, and receiving the detection result, and determining whether to adjust the clamp signal corresponding to the current line scan among the clamp signals according to the detection result, and

[0029] a plurality of scan units each receiving an input voltage, and respectively electrically connected to the scan lines, and each electrically connected to the scan control unit to receive a corresponding scan signal among the scan signals and a corresponding clamp signal among the clamp signals, each scan unit determining whether to output the input voltage according to the corresponding scan signal among the scan signals, and determining whether to output a second clamp voltage according to the corresponding clamp signal among the clamp signals, and each scan unit outputting one of the input voltage and the second clamp voltage to a corresponding scan line among the scan lines.

[0030] The scanning display with short-circuit detection function of the present application, each scanning unit includes,

[0031] a scan switch having a first terminal for receiving the input voltage and a second terminal electrically connected to the corresponding one of the scan lines, the scan switch being controlled by the corresponding one of the scan signals to be turned on or off, and when turned on, outputting the input voltage to the corresponding scan line through the second terminal of the scan switch,

[0032] a voltage stabilizer for generating the second clamp voltage, and

[0033] a clamp switch having a first terminal electrically connected to the voltage stabilizer for receiving the second clamp voltage and a second terminal electrically connected to the second terminal of the scan switch, the clamp switch being controlled by the corresponding one of the clamp signals to be turned on or off, and when turned on, outputting the second clamp voltage to the corresponding scan line through the second terminal of the scan switch, the turn-on time of the clamp switch being different from the turn-on time of the scan switch.

[0034] The scanning display with short-circuit detection function of the present application, the data device further includes,

[0035] a pulse width control unit electrically connected to the scan control unit and the current drive circuit and the detection circuit of each drive unit, for generating and outputting the pulse width control signal required by each current drive circuit and the detection timing signal required by each detection circuit, and receiving the detection results from the detection circuit and outputting to the scan control unit.

[0036] The scanning display with short-circuit detection function of the present application,

[0037] The data device further includes a pulse width control unit electrically connected to the current drive circuit and the detection circuit of each drive unit, for generating and outputting the pulse width control signal required by each current drive circuit and the detection timing signal required by each detection circuit, and

[0038] The scan control unit is electrically connected to the detection circuit of the drive unit to receive the detection results.

[0039] The scanning display with short-circuit detection function of the present application, a scan period of each scanning unit includes a scan interval and a clamp interval, in the scan period of each scanning unit,

[0040] The scan signal and the clamp signal are complementary, in the scan interval, the scan signal has a turn-on level, in the clamp interval, the scan signal has a turn-off level, and

[0041] The detection timing signal has a plurality of detection levels, the detection levels correspond to the scan intervals of the scan units respectively, the duration of each detection level changes with the change of a predetermined reference voltage, and the duration of each detection level is the same and less than each scan interval.

[0042] The scan display with short circuit detection function of the present application, in adjacent two scan units, an end point of the on level of the scan signal of the former scan unit corresponds to a start point of the on level of the scan signal of the next scan unit.

[0043] The scan display with short circuit detection function of the present application, when one of the detection results indicates that the corresponding data line is abnormal, the scan control unit adjusts the clamp signal corresponding to the current row scan in the clamp signal according to the detection results, so that the scan interval of the current row scan, the clamp signal corresponding to the current row scan in the clamp signal maintains at the off level, in the clamp interval, the clamp signal corresponding to the current row scan in the clamp signal has the on level in a clamp on time, and the clamp on time is located in an initial period of the corresponding clamp interval.

[0044] The scan display with short circuit detection function of the present application further comprises:

[0045] A plurality of the display devices are electrically connected in a matrix arrangement; and

[0046] A plurality of the data devices are sequentially connected, each data device is electrically connected to the corresponding display device, the last data device is further electrically connected to the scan control unit of the scan device, the last data device receives the detection results generated by each of the remaining data devices, and transmits the received detection results and the detection results generated by itself to the scan control unit.

[0047] The scan display with short circuit detection function of the present application further comprises:

[0048] A plurality of the scan devices, each scan device is electrically connected to the corresponding display device;

[0049] The last data device is electrically connected to the scan control unit of the scan device, and transmits the received detection results and the detection results generated by itself to the scan control unit of the scan device.

[0050] The scan display with short circuit detection function of the present application further comprises:

[0051] A plurality of the display devices are electrically connected in a matrix arrangement; and

[0052] a plurality of the data devices, each of the data devices electrically connected to the scan control unit of the scan device and the corresponding display device, each of the data devices transmitting the generated detection result to the scan control unit.

[0053] The scan display with short circuit detection function of the present application further comprises:

[0054] a plurality of the scan devices, the scan control units of the scan devices being sequentially connected, and each of the scan devices electrically connected to the corresponding display device; and

[0055] each of the data devices electrically connected to the scan control unit of the scan device and the corresponding display device, each of the data devices transmitting the generated detection result to the scan control unit.

[0056] The scan display with short circuit detection function of the present application further comprises:

[0057] a plurality of the display devices, the display devices being electrically connected in a matrix arrangement;

[0058] a plurality of the scan devices, the scan control units of the scan devices being sequentially connected, and each of the scan devices electrically connected to the corresponding display device; and

[0059] a plurality of the data devices, the data devices being sequentially connected, each of the data devices electrically connected to the corresponding display device, the last data device further electrically connected to the scan control unit of the first scan device of the scan devices, the last data device receiving the detection result generated by each of the remaining data devices of the data devices and transmitting the received detection result and the detection result generated by itself to the scan control unit of the first scan device, the scan control unit of the ith scan device transmitting the received detection result to the scan control unit of the (i+1)th scan device, i being a positive integer, 1≤i≤N-1, and N being a total number of the scan devices.

[0060] The scan display with short circuit detection function of the present application further comprises:

[0061] a plurality of the display devices, the display devices being electrically connected in a matrix arrangement;

[0062] a plurality of the scan devices, the scan control units of the scan devices being sequentially connected, and each of the scan devices electrically connected to the corresponding display device; and

[0063] A plurality of the data devices, each of which is electrically connected to a corresponding one of the display devices and a scan control unit of a first one of the scan devices, each of the data devices transmits the detection result generated thereby to the scan control unit of the first one of the scan devices, a scan control unit of an i-th one of the scan devices transmits the detection result received thereby to a scan control unit of an (i+1)-th one of the scan devices, i is a positive integer, 1≦i≦N-1, and N is a total number of the scan devices.

[0064] The scanning display with short-circuit detection function of the present application further comprises:

[0065] A plurality of the display devices are electrically connected in a matrix arrangement.

[0066] A control device is electrically connected to a scan control unit of a first one of the scan devices.

[0067] A plurality of the data devices are sequentially connected in series, each of the data devices is electrically connected to a corresponding one of the display devices, a last one of the data devices is further electrically connected to the control device, the last one of the data devices receives the detection result generated by each of the other data devices, and transmits the detection result received thereby and the detection result generated thereby to the scan control unit via the control device.

[0068] The scanning display with short-circuit detection function of the present application further comprises:

[0069] A plurality of the scan devices, each of which is electrically connected to a corresponding one of the display devices.

[0070] The control device is electrically connected to a scan control unit of each of the scan devices, and

[0071] The last one of the data devices transmits the detection result received thereby and the detection result generated thereby to the scan control unit of each of the scan devices via the control device.

[0072] The scanning display with short-circuit detection function of the present application further comprises:

[0073] A plurality of the display devices are electrically connected in a matrix arrangement.

[0074] A plurality of the scan devices, scan control units of the scan devices are sequentially connected in series, and each of the scan devices is electrically connected to a corresponding one of the display devices.

[0075] A control device is electrically connected to a scan control unit of a first one of the scan devices.

[0076] A plurality of the data devices are sequentially connected in series, each of the data devices is electrically connected to a corresponding one of the display devices, a last one of the data devices is further electrically connected to the control device, the last one of the data devices receives the detection results generated by each of the remaining ones of the data devices, and transmits the received detection results and the detection results generated by the last one of the data devices to the scan control unit of the first scan device via the control device, the scan control unit of the i-th scan device transmits the received detection results to the scan control unit of the (i+1)-th scan device, i is a positive integer, 1≤i≤N-1, and N is a total number of the scan devices.

[0077] Another object of the present application is to provide a data device of a scanning display capable of overcoming the drawbacks of the prior art.

[0078] The data device of the scanning display of the present application includes a plurality of driving units, each of which comprises a current driving circuit and a detection circuit.

[0079] The current driving circuit has an output terminal electrically connected to a corresponding one of the data lines, and is controlled by a pulse width control signal to generate one of a driving current and a first clamping voltage at the output terminal and output to the corresponding data line.

[0080] The detection circuit receives a detection timing signal, detects a voltage at the output terminal of the current driving circuit, and generates a detection result indicating whether the corresponding data line is abnormal based on the voltage at the output terminal and the detection timing signal.

[0081] The data device of the scanning display of the present application includes, in each of the driving units, the detection circuit comprises,

[0082] a comparator having a first input terminal for detecting the voltage at the output terminal of the current driving circuit, a second input terminal for receiving a predetermined reference voltage, and an output terminal for providing a comparison result of a comparison between the voltage at the output terminal and the predetermined reference voltage, and

[0083] a logic gate having a first input terminal electrically connected to the comparator for receiving the comparison result, a second input terminal for receiving the detection timing signal, and an output terminal, the logic gate generating the detection result at the output terminal of the logic gate based on the comparison result and the detection timing signal.

[0084] The data device of the scanning display of the present application includes, in each of the driving units, the detection circuit is electrically connected to the output terminal of the current driving circuit for detecting the voltage at the output terminal, and the current driving circuit comprises,

[0085] a voltage stabilizer for generating the first clamp voltage,

[0086] an inverter for receiving the pulse width control signal and generating an inverted signal according to the pulse width control signal,

[0087] a constant current generator for generating the driving current,

[0088] a first switch having a first terminal electrically connected to an output terminal of the current driving circuit and a second terminal electrically connected to the constant current generator for receiving the driving current, the first switch being controlled by the pulse width control signal to be turned on or off, and outputting the driving current to the corresponding data line when turned on, and

[0089] a second switch having a first terminal electrically connected to the voltage stabilizer for receiving the first clamp voltage and a second terminal electrically connected to an output terminal of the current driving circuit, the second switch being controlled by the inverted signal to be turned on or off, and outputting the first clamp voltage to the corresponding data line when turned on.

[0090] The present application has the advantage that each detection circuit detects the output terminal of each current driving circuit, so that it can be known in real time whether the corresponding data line is abnormal due to the short circuit of the corresponding light emitting diode, so as to avoid the short circuit caterpillar phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0091] Other features and effects of the present application will be apparent from the embodiments described below with reference to the drawings.

[0092] Figure 1 Fig. 1 is a circuit block diagram illustrating a first embodiment of a scan display with a short circuit detection function according to the present application;

[0093] Figure 2 Fig. 2 is a circuit block diagram illustrating a scan unit of the first embodiment;

[0094] Figure 3 Fig. 3 is a circuit block diagram illustrating a driving unit of the first embodiment;

[0095] Figure 4 Fig. 4 is a timing chart illustrating a plurality of scan signals, a plurality of clamp signals, a detection timing signal, a pulse width control signal, a predetermined reference voltage, and voltages of output terminals of the scan unit and the driving unit of the first embodiment;

[0096] Figure 5 Fig. 5 is a timing chart illustrating that the detection timing signal of the first embodiment is changed with the change of the predetermined reference voltage;

[0097] Figure 6Fig. 1 is a timing diagram illustrating the first embodiment detecting a short circuit and adjusting the scan signal, the clamp signal, and the voltage at the output terminal of the scan unit and the driving unit;

[0098] Figure 7 Fig. 2 is a circuit block diagram illustrating a second embodiment of a driving unit of a scan display with short circuit detection function of the present application; and

[0099] Figures 8 to 17 Fig. 3 illustrates various implementation manners of the first embodiment in which the detection results are transmitted to the corresponding scan control units through different transmission paths. DETAILED DESCRIPTION

[0100] Before the present application is described in detail, it is to be understood that, throughout the description, like elements are referred to with like numerals.

[0101] <First Embodiment>

[0102] Referring to Figures 1 to 3 The scan display with short circuit detection function of the present application comprises a display device 1, a scan device 2, a data device 3, and other necessary elements (not shown in the figure).

[0103] The display device 1 comprises a common anode architecture light emitting diode (LED) array 11. The LED array 11 comprises a plurality of scan lines 111, a plurality of data lines 112, and a plurality of LEDs 113.

[0104] The scan lines 111 are arranged along a row direction. The data lines 112 are arranged perpendicularly to the scan lines 111 along a column direction. The LEDs 113 are arranged in a matrix defined by the scan lines 111 and the data lines 112, respectively. Each LED 113 has an anode electrically connected to the corresponding scan line 111, and a cathode electrically connected to the corresponding data line 112.

[0105] The scanning device 2 includes a plurality of scanning units 21 and a scanning control unit 22. The scanning control unit 22 generates a plurality of scanning signals SC1-SCj and a plurality of clamp signals CS1-CSj. Each of the scanning units 21 receives an input voltage Vin and is electrically connected to a corresponding one of the scanning lines 111 and is electrically connected to the scanning control unit 22 to receive a corresponding one of the scanning signals SC1-SCj and a corresponding one of the clamp signals CS1-CSj. Each of the scanning units 21 decides whether to output the input voltage Vin according to the corresponding one of the scanning signals SC1-SCj and decides whether to output a second clamp voltage Vc2 according to the corresponding one of the clamp signals CS1-CSj. Each of the scanning units 21 outputs one of the input voltage Vin and the second clamp voltage Vc2 to the corresponding one of the scanning lines 111. It is to be noted that the second clamp voltage Vc2 is used to improve the ghosting phenomenon and the coupling problem of a known LED display, which is well known to those skilled in the art and will not be described here for the sake of brevity. In the embodiment, each of the scanning units 21 includes a scanning switch 211, a voltage stabilizer 212, and a clamp switch 213, and the detailed circuit connection relationship of each of the scanning units 21 is the same, so in the following description, only the detailed circuit connection relationship of the jth scanning unit 21 is described. Figure 2

[0106] The scanning switch 211 has a first end for receiving the input voltage Vin and a second end electrically connected to the corresponding one of the scanning lines 111. The scanning switch 211 is controlled by the scanning signal SCj (i.e., the corresponding one of the scanning signals) to be turned on or turned off, and when turned on, outputs the input voltage Vin to the corresponding one of the scanning lines 111 via the second end.

[0107] The voltage stabilizer 212 generates the second clamp voltage Vc2.

[0108] The clamp switch 213 has a first end electrically connected to the voltage stabilizer 212 to receive the second clamp voltage Vc2 and a second end electrically connected to the second end of the scanning switch 211. The clamp switch 213 is controlled by the clamp signal CSj (i.e., the corresponding one of the clamp signals) to be turned on or turned off, and when turned on, outputs the second clamp voltage Vc2 to the corresponding one of the scanning lines 111 via the second end of the scanning switch 211. The on time of the clamp switch 213 is different from the on time of the scanning switch 211.

[0109] ​The data device 3 includes a plurality of driving units 31 and a pulse width control unit 32. In the present embodiment, each driving unit 31 includes a current driving circuit 311 and a detection circuit 312, and the detailed circuit connection relationship of each driving unit 31 is the same, so in the following description, only the detailed circuit connection relationship of the jth driving unit 31 is described. Figure 3

[0110] The current driving circuit 311 has an output terminal Q1 electrically connected to a corresponding data line 112 of the data lines 112, and generates and outputs one of a driving current Id and a first clamping voltage Vc1 to the corresponding data line 112 at the output terminal Q1 under the control of a pulse width control signal Pcj. In the present embodiment, the current driving circuit 311 includes a voltage stabilizer 313, an inverter 314, a constant current device 315, and a first switch 316 and a second switch 317.

[0111] The voltage stabilizer 313 generates the first clamping voltage Vc1. The constant current device 315 generates the driving current Id.

[0112] The inverter 314 receives the pulse width control signal Pcj and generates an inverted signal Is according to the pulse width control signal Pcj.

[0113] The first switch 316 has a first terminal electrically connected to the output terminal Q1 of the current driving circuit 311, and a second terminal electrically connected to the constant current device 315 to receive the driving current Id. The first switch 316 is controlled by the pulse width control signal Pcj to be turned on or turned off, and when turned on, outputs the driving current Id to the corresponding data line 112.

[0114] The second switch 317 has a first terminal electrically connected to the voltage stabilizer 313 to receive the first clamping voltage Vc1, and a second terminal electrically connected to the output terminal Q1 of the current driving circuit 311. The second switch 317 is controlled by the inverted signal Is to be turned on or turned off, and when turned on, outputs the first clamping voltage Vc1 to the corresponding data line 112.

[0115] ​The detection circuit 312 receives a detection timing signal DTj and is electrically connected to the output terminal Ql of the current driving circuit 311 to detect the voltage of the output terminal Ql, and generates a detection result indicating whether the corresponding data line 112 is abnormal according to the voltage of the output terminal Ql and the detection timing signal DTj. In detail, when each LED 113 electrically connected to the corresponding data line 112 is not short-circuited, the voltage of the output terminal Ql is related to the first clamping voltage Vcl and the driving current Id, and the corresponding data line 112 is in a normal state; when one of the LEDs 113 electrically connected to the corresponding data line 112 is short-circuited, the voltage of the output terminal Ql is related to the input voltage Vin output by the scanning unit 21 corresponding to the short-circuited LED 113 and the second clamping voltage Vc2, so that the voltage of the output terminal Ql will be abnormally high for a short time, causing the corresponding data line 112 to be in an abnormal state. In the embodiment, the detection circuit 312 includes a comparator 318 and a logic gate 319.

[0116] The comparator 318 has a first input terminal electrically connected to the output terminal Ql of the current driving circuit 311 to detect the voltage of the output terminal Ql, a second input terminal receiving a predetermined reference voltage Vr, and an output terminal providing a comparison result Cr between the voltage of the output terminal Ql and the predetermined reference voltage Vr.

[0117] The logic gate 319 has a first input terminal electrically connected to the comparator 318 to receive the comparison result Cr, a second input terminal receiving the detection timing signal DTj, and an output terminal. The logic gate 319 generates the detection result Drj at the output terminal of the logic gate 319 according to the comparison result Cr and the detection timing signal DTj. In the embodiment, the logic gate 319 is an AND gate, but is not limited thereto.

[0118] The pulse width control unit 32 is electrically connected to the scanning control unit 22, and the current driving circuit 311 and the detection circuit 312 of the driving unit 31, generates and outputs the pulse width control signals Pc1-Pcj required by the current driving circuit 311 and the detection timing signals DT1-DTj required by the detection circuit 312 respectively, and receives the detection results Dr1-Drj from the detection circuit 312 and outputs to the scanning control unit 22. In the embodiment, the pulse width control signals Pc1-Pcj are the same, and the detection timing signals DT1-DTj are the same.

[0119] Referring to Figure 4This is a timing diagram. Taking the scanning device 2 of the first embodiment, which includes four scanning units 21 and a scanning control unit 22 generating four scanning signals SC1-SC4 and four clamping signals CS1-CS4, as an example, but not limited to this, the diagram illustrates the changes of the four scanning signals SC1-SC4, the four clamping signals CS1-CS4, the pulse width control signal Pcj, and the detection timing signal DTj over time. Simultaneously, the voltage NV at the output terminal Q1 when each LED 113 is not short-circuited is also explained. Q1 Taking the short circuit of LED113 in the second row and second column of LED array 11 as an example, but not limited to this, it is explained that when LED113 in the second row and second column is short-circuited, the voltage SV of the corresponding output terminal Q1 is... Q1 The voltage Vsw2 is related to the second terminal of the scan switch 211 of the second scan unit 21. In this embodiment, the voltage NV of the output terminal Q1 is... Q1 The minimum voltage value is the corresponding LED113 voltage minus the LED's on-state voltage, and the voltage NV at output terminal Q1 is... Q1 The maximum voltage value is the first clamping voltage Vc1.

[0120] In detail, each scanning period T of each scanning unit 21 includes a scanning interval Si and a clamping interval Ci. When each LED 113 is not short-circuited, in the scanning period T of each scanning unit 21, the scanning signal SCj and the clamping signal CSj are complementary (i.e., the scanning signals SC1 to SC4 are complementary to the clamping signals CS1 to CS4 respectively). In the scanning interval Si, the scanning signal SCj (i.e., one of the scanning signals SC1 to SC4) has a conducting level (i.e., logic "1"). In the clamping interval Ci, the scanning signal SCj has a non-conducting level (i.e., logic "0"). Furthermore, in two adjacent scanning units 21, the end point of the conducting level of the scanning signal of the previous scanning unit 21 corresponds to the start point of the conducting level of the scanning signal of the next scanning unit 21. For example, the end point of the conduction level of the scan signal SC1 of the first scan unit 21 corresponds to the start point of the conduction level of the scan signal SC2 of the second scan unit 21. In the scan period T of each scan unit 21, the detection timing signal DTj has four detection levels (i.e., logic "1"). These four detection levels correspond to the scan intervals Si of the four scan units 21, respectively. The duration of each detection level is the same and less than that of each scan interval Si. See further... Figure 4 and Figure 5 This indicates that the duration of each detection level of the detection timing signal DTj varies with the change of the predetermined reference voltage Vr.

[0121] In this case, when any one of the LEDs 113 electrically connected to any one of the data lines 112 has a short circuit, and the detection timing signal DTj has the detection level, the detection result Drj generated by the logic gate 319 has a high logic level "1", to indicate that the corresponding data line 112 is abnormal. The following takes the short circuit of the LED 113 in the second row and the second column as an example to be described in detail. When the LED 113 in the second row and the second column has a short circuit, the voltage of the output terminal Q1 will change with the voltage of the second end of the scanning switch 211 of the corresponding scanning unit 21, so when the scanning signal SC2 has the on level, the voltage of the output terminal Q1 is affected by the input voltage Vin and is abnormally pulled up for a short time (as shown in FIG. 8). Figure 4 、 Figure 5 The voltage SV Q1 of the output terminal Q1 Q1 The comparator 318 of the driving unit 31 of the second column of the LED array 11 generates the comparison result Cr according to the voltage SV Q1 of the output terminal Q1 and the predetermined reference voltage Vr, so when the detection timing signal DT2 has the detection level, the detection result Dr2 generated by the logic gate 319 of the corresponding driving unit 31 according to the comparison result Cr and the detection timing signal DT2 has the high logic level, and then the scanning control unit 22 can know that the corresponding data line 112 is abnormal.

[0122] Further referring to Figure 6, when one of the detection results Dr1-Drj indicates that the corresponding data line 112 is abnormal, the scan control unit 22 adjusts the clamp signal corresponding to the current scan line among the clamp signals CS1-CSj according to the detection results Dr1-Drj. The following description continues with the detection result Dr2 having the high logic level and the display device 1 currently scanning to the second scan line. When the detection result Dr2 among the detection results Dr1-Drj has the high logic level, the scan control unit 22 adjusts the clamp signal CS2 corresponding to the current scan line among the clamp signals CS1-CSj according to the detection result Dr2, so that the scan interval Si of the current scan line, the clamp signal CS2 maintains at the non-conduction level, in the clamp interval Ci, the clamp signal CS2 has the conduction level for a clamp conduction time t1, and the clamp conduction time t1 is located in a corresponding initial period of the clamp interval Ci. In this embodiment, a starting point of the clamp conduction time t1 is spaced from the end point of the conduction level of the scan signal SC2, but is not limited thereto. In other embodiments, the end point of the conduction level of the scan signal SC2 can be used as the starting point of the clamp conduction time t1. In addition, if the detection result Dr2 has the high logic level and the display device 1 currently scans to the third scan line, the scan control unit 22 adjusts the clamp signal CS3 corresponding to the current scan line according to the detection result Dr2. In this way, after the scan control unit 22 adjusts the clamp signal CS2, the voltage of the corresponding output terminal Q1 and the voltage of the second terminal of the scan switch 211 of the corresponding scan unit 21 are respectively changed to the voltages SV Figure 6 Q1 ', Vsw2' as shown. In a clamp period Ct of each scan period T of the corresponding scan unit 21, due to the short circuit of the corresponding LED 113, and the scan signal SC2 and the clamp signal CS2 having the non-conduction level, the voltage SV Q1 ' of the output terminal Q1 is approximately the voltage NV Q1 of the output terminal Q1 when each LED 113 is not short-circuited, and the voltage Vsw2' of the second terminal of the scan switch 211 is approximately the voltage NV Q1 of the output terminal Q1 when each LED 113 is not short-circuited, affected by the voltage of the corresponding output terminal Q1. In this way, the voltage Vsw2' of the second terminal of the scan switch 211 cannot be clamped by the clamp voltage Vc to clamp the voltage of the corresponding data line 112, so that the plurality of LEDs 113 of the corresponding data line 112 cannot be constantly bright or constantly dark due to the short circuit of the corresponding LED 113, thereby avoiding the short-circuit caterpillar phenomenon.

[0123] <Second embodiment>

[0124] ​Referring to Figure 7 A second embodiment of the driving device of the present application is a modification of the first embodiment, and the difference between the two is that the constant current source 315 and the first switch 316 of the first embodiment are replaced by a constant current source 315' and a first switch 316', respectively. Figure 3

[0125] The constant current source 315' is electrically connected to the first input terminal of the comparator 318 of the detection circuit 312, and generates the driving current Id. The first switch 316' has a first terminal electrically connected to the output terminal Q1 of the current driving circuit 311, and a second terminal electrically connected to the first input terminal of the comparator 318 and receiving the driving current Id. The first switch 316' is controlled by the pulse width control signal Pcj to be turned on or off. When the first switch 316' is turned on, the first switch 316' outputs the driving current Id to the corresponding data line 112, and the detection circuit 312 detects the voltage of the output terminal Q1 of the current driving circuit 311 via the first switch 316' to determine whether the corresponding data line 112 is abnormal.

[0126] It should be noted that the second embodiment has similar operation as described above in the first embodiment, and can achieve all the effects as described above in the first embodiment. For the sake of brevity, the description is not repeated here.

[0127] It should be noted that, as shown in Figure 1 , the scan control unit 22 decides whether to adjust the corresponding current line scan of the clamp signal among the clamp signals CS1-CSj according to the detection results Dr1-Drj from the pulse width control unit 32, but is not limited thereto. The scan control unit 22 can also decide whether to adjust the corresponding current line scan of the clamp signal among the clamp signals CS1-CSj according to the detection results from the driving unit 31, or the detection results from the last data device 3 among the plurality of data devices 3, or the detection results from each data device 3, or the detection results received via at least one data device 3 and a control device.

[0128] In detail, referring to Figures 8 to 17 , various implementation forms of the detection results transmitted to the corresponding scan control unit 22 via different transmission paths are described.

[0129] Referring to Figure 8 , Figure 8 and Figure 1 ​The difference between the two is that the pulse width control unit 32 is not electrically connected to the scan control unit 22, but the detection circuit 312 (not shown) of the driving unit 31 is electrically connected to the scan control unit 22. In this way, the detection circuit 312 of the driving unit 31 can directly transmit the detection results Dr1-Drj to the scan control unit 22 to determine whether to adjust the clamp signal corresponding to the current line scan among the clamp signals CS1-CSj. In other words, the detection circuit 312 does not need to transmit the detection results Dr1-Drj to the pulse width control unit 32 first, and then transmit them to the scan control unit 22 by the pulse width control unit 32.

[0130] Referring to Figure 9 , Figure 9 and Figure 1 similarly, the difference between the two is that Figure 9 in which the scanning display includes two display devices 1 and two data devices 3. The display devices 1 are electrically connected in a matrix arrangement. The pulse width control units 32 of the data devices 3 are sequentially connected in series, each data device 3 is electrically connected to the corresponding display device 1, and the pulse width control unit 32 of the last data device 3 is electrically connected to the scan control unit 22. The pulse width control unit 32 of the last data device 3 receives the detection results Dr1-Drj generated by the pulse width control unit 32 of the first data device 3 (i.e., the last data device 3 receives the detection results generated by each of the remaining data devices 3), and transmits the received detection results Dr1-Drj and the detection results Dr1'-Drj' generated by itself to the scan control unit 22.

[0131] Referring to Figure 10 , Figure 10 and Figure 9 similarly, the difference between the two is that Figure 10 in which the scanning display includes four display devices 1 and two scanning devices 2. Each scanning device 2 is electrically connected to the corresponding display device 1. The pulse width control unit 32 of the last data device 3 is electrically connected to the scan control unit 22 of the scanning device 2. The pulse width control unit 32 of the last data device 3 transmits the received detection results Dr1-Drj and the detection results Dr1'-Drj' generated by itself to the scan control unit 22 of the scanning device 2.

[0132] Referring to Figure 11 , Figure 11 and Figure 10 similarly, the difference between the two is that Figure 11In the case of the first embodiment, the scan control units 22 of the scan devices 2 are sequentially connected in series. The pulse width control unit 32 of the last data device 3 is electrically connected to the scan control unit 22 of the first scan device 2 of the scan devices 2. The pulse width control unit 32 of the last data device 3 transmits the detection results Dr1 to Drj received and the detection results Dr1' to Drj' generated by itself to the scan control unit 22 of the first scan device 2. The scan control unit 22 of the i-th scan device 2 transmits the detection results Dr1 to Drj and Dr1' to Drj' received to the scan control unit 22 of the (i+1)-th scan device 2, i being a positive integer, 1 ≦ i ≦ N-1, and N being the total number of the scan devices 2. For example, in the case of N=2, the scan control unit 22 of the first scan device 2 transmits the detection results Dr1 to Drj and Dr1' to Drj' received to the scan control unit 22 of the second scan device 2. Figure 11 In the case of the first embodiment, the scan control units 22 of the scan devices 2 are sequentially connected in series. The pulse width control unit 32 of the last data device 3 is electrically connected to the scan control unit 22 of the first scan device 2 of the scan devices 2. The pulse width control unit 32 of the last data device 3 transmits the detection results Dr1 to Drj received and the detection results Dr1' to Drj' generated by itself to the scan control unit 22 of the first scan device 2. The scan control unit 22 of the i-th scan device 2 transmits the detection results Dr1 to Drj and Dr1' to Drj' received to the scan control unit 22 of the (i+1)-th scan device 2, i being a positive integer, 1 ≦ i ≦ N-1, and N being the total number of the scan devices 2. For example, in the case of N=2, the scan control unit 22 of the first scan device 2 transmits the detection results Dr1 to Drj and Dr1' to Drj' received to the scan control unit 22 of the second scan device 2.

[0133] Referring to Figure 12 , Figure 12 and Figure 11 similarly, the difference between them is that Figure 12 In the case of the second embodiment, the pulse width control units 32 of the data devices 3 are not sequentially connected in series. The pulse width control unit 32 of each data device 3 is electrically connected to the scan control unit 22 of the first scan device 2. The pulse width control units 32 of the data devices 3 transmit the detection results Dr1 to Drj and Dr1' to Drj' generated, respectively, to the scan control unit 22 of the first scan device 2.

[0134] Referring to Figure 13 , Figure 13 and Figure 9 similarly, the difference between them is that Figure 13 In the case of the second embodiment, the pulse width control units 32 of the data devices 3 are not sequentially connected in series. The pulse width control unit 32 of each data device 3 is electrically connected to the scan control unit 22 of the first scan device 2. The pulse width control units 32 of the data devices 3 transmit the detection results Dr1 to Drj and Dr1' to Drj' generated, respectively, to the scan control unit 22 of the first scan device 2.

[0135] Referring to Figure 14 , Figure 14 and Figure 13 similarly, the difference between them is that Figure 14In the scanning display, four display devices 1 and two scanning devices 2 are included. Each scanning device 2 is electrically connected to the corresponding display device 1. The pulse width control unit 32 of each data device 3 is electrically connected to the scanning control unit 22 of the scanning device 2 and the corresponding display device 1. The pulse width control unit 32 of the data device 3 transmits the detection results Dr1-Drj and Dr1'-Drj' generated respectively to the scanning control unit 22.

[0136] Referring to Figure 15 , Figure 16 and Figure 17 , Figures 15 to 17 respectively, the difference is that Figures 9 to 11 , Figure 15 , Figure 16 and Figure 17 In the scanning display, a control device 4 is further included.

[0137] In the scanning display, a control device 4 is further included. Figure 15 The pulse width control unit 32 of the last data device 3 is electrically connected to the scanning control unit 22 of the scanning device 2 via the control device 4. The pulse width control unit 32 of the last data device 3 transmits the detection results Dr1-Drj received and the detection results Dr1'-Drj' generated by itself to the scanning control unit 22 via the control device 4.

[0138] In the scanning display, a control device 4 is further included. Figure 16 The pulse width control unit 32 of the last data device 3 is electrically connected to the scanning control unit 22 of the scanning device 2 via the control device 4. The pulse width control unit 32 of the last data device 3 transmits the detection results Dr1-Drj received and the detection results Dr1'-Drj' generated by itself to the scanning control unit 22 via the control device 4.

[0139] In the scanning display, a control device 4 is further included. Figure 17 The pulse width control unit 32 of the last data device 3 is electrically connected to the scanning control unit 22 of the first scanning device 2 via the control device 4. The pulse width control unit 32 of the last data device 3 transmits the detection results Dr1-Drj and Dr1'-Drj' to the scanning control unit 22 of the first scanning device 2 via the control device 4.

[0140] It should be noted that the control device 4 can be operated to generate the relevant parameter settings and gray scale data required for normal display of the scanning device 2 and the data device 3. Since the technology of the control device 4 is well known to those skilled in the art, and it is not a feature of the present application, the details thereof are omitted here.

[0141] In summary, the short-circuit detection function of the scanning display is achieved by detecting the output terminal Q1 of each current driving circuit 311 by each detection circuit 312, and transmitting the detection result Drj to the corresponding scanning control unit 22, so that the corresponding scanning control unit 22 can know whether the corresponding data line 112 is abnormal due to the short circuit of the LED 113, and adjust the clamp signal CSj of the corresponding current row scanning, so that the voltage Vsw2' of the second terminal of the corresponding scanning switch 211 cannot be clamped by the clamp voltage Vc, and the voltage of the corresponding data line 112 cannot be clamped, so that the multiple LEDs 113 of the corresponding data line 112 cannot be constantly bright or constantly dark due to the short circuit of the corresponding LED 113, and the short-circuit caterpillar phenomenon can be avoided. In addition, the data device 3 transmits the detection results Dr1-Drj to each scanning device 2 or the control device 4 to inform each scanning device 2 or the control device 4 whether the data line 112 is abnormal, so that the data device 3 has the function of informing.

[0142] The above is only an embodiment of the present application, and cannot limit the scope of the present application. Any simple equivalent changes and modifications made in accordance with the claims and description of the present application are still within the scope of the present application.

Claims

1. A scanning display with short-circuit detection function, characterized in that, A display device comprising: a common anode architecture light emitting diode array comprising, a plurality of scan lines arranged along a row direction, a plurality of data lines arranged along a column direction perpendicular to the scan lines, and a plurality of light emitting diodes arranged in a matrix defined by the scan lines and the data lines, each light emitting diode having an anode electrically connected to a corresponding scan line and a cathode electrically connected to a corresponding data line; and a data driving device comprising a plurality of driving units, each driving unit comprising, a current driving circuit having an output terminal electrically connected to a corresponding data line of the data lines, and being controlled by a pulse width control signal to generate and output one of a driving current and a first clamp voltage to the corresponding data line at the output terminal, and a detection circuit receiving a detection timing signal and detecting a voltage at the output terminal of the current driving circuit, and generating a detection result indicating whether the corresponding data line is abnormal based on the voltage at the output terminal and the detection timing signal; in each driving unit, the current driving circuit comprises, a voltage stabilizer generating the first clamp voltage, an inverter receiving the pulse width control signal and generating an inverted signal based on the pulse width control signal, a constant current generator generating the driving current, a first switch having a first terminal electrically connected to the output terminal of the current driving circuit, and a second terminal electrically connected to the constant current generator to receive the driving current, the first switch being controlled by the pulse width control signal to be turned on or off, and outputting the driving current to the corresponding data line when turned on, and a second switch having a first terminal electrically connected to the voltage stabilizer to receive the first clamp voltage, and a second terminal electrically connected to the output terminal of the current driving circuit, the second switch being controlled by the inverted signal to be turned on or off, and outputting the first clamp voltage to the corresponding data line when turned on, wherein the detection circuit is electrically connected to the output terminal of the current driving circuit to detect the voltage at the output terminal; or, the current driving circuit comprises, a voltage stabilizer generating the first clamp voltage, an inverter receiving the pulse width control signal and generating an inverted signal based on the pulse width control signal, a constant current generator electrically connected to the detection circuit and generating the driving current, a first switch having a first terminal electrically connected to the output terminal of the current driving circuit, and a second terminal electrically connected to the detection circuit and the constant current generator to receive the driving current, the first switch being controlled by the pulse width control signal to be turned on or off, and when the first switch is turned on, the first switch outputs the driving current to the corresponding data line, and the detection circuit detects the voltage at the output terminal of the current driving circuit via the first switch, and a second switch having a first terminal electrically connected to the voltage stabilizer to receive the first clamp voltage, and a second terminal electrically connected to the output terminal of the current driving circuit, the second switch being controlled by the inverted signal to be turned on or off, and outputting the first clamp voltage to the corresponding data line when turned on. in each driving unit, the detection circuit comprises, 2. The short-circuit detecting function-equipped scanning display according to claim 1, characterized by: ​ a comparator having a first input terminal for detecting a voltage of the output terminal of the current driving circuit, a second input terminal for receiving a predetermined reference voltage, and an output terminal for providing a comparison result of a comparison between the voltage of the output terminal of the current driving circuit and the predetermined reference voltage, and a logic gate having a first input terminal electrically connected to the comparator for receiving the comparison result, a second input terminal for receiving the detection timing signal, and an output terminal, the logic gate generating the detection result at the output terminal of the logic gate according to the comparison result and the detection timing signal.

3. The short-circuit detecting function-equipped scanning display according to claim 1, wherein: The data device further comprises a scanning device including a scanning control unit generating a plurality of scanning signals and a plurality of clamp signals, and receiving the detection result, and determining whether to adjust the clamp signal corresponding to the current row scan among the clamp signals according to the detection result, and a plurality of scanning units each receiving an input voltage, and respectively electrically connected to the scanning lines, and each electrically connected to the scanning control unit for receiving a corresponding scanning signal among the scanning signals and a corresponding clamp signal among the clamp signals, each of the scanning units determining whether to output the input voltage according to the corresponding scanning signal among the scanning signals, and determining whether to output a second clamp voltage according to the corresponding clamp signal among the clamp signals, each of the scanning units outputting one of the input voltage and the second clamp voltage to a corresponding scanning line among the scanning lines.

4. The short-circuit detecting function-equipped scanning display according to claim 3, characterized by: Each of the scanning units includes, a scanning switch having a first terminal for receiving the input voltage, and a second terminal electrically connected to the corresponding scanning line among the scanning lines, the scanning switch being controlled to be turned on or turned off by the corresponding scanning signal among the scanning signals, and outputting the input voltage to the corresponding scanning line through the second terminal of the scanning switch when turned on, a voltage stabilizer generating the second clamp voltage, and a clamp switch having a first terminal electrically connected to the voltage stabilizer of the scanning unit for receiving the second clamp voltage, and a second terminal electrically connected to the second terminal of the scanning switch, the clamp switch being controlled to be turned on or turned off by the corresponding clamp signal among the clamp signals, and outputting the second clamp voltage to the corresponding scanning line through the second terminal of the scanning switch when turned on, the turn-on time of the clamp switch being different from the turn-on time of the scanning switch.

5. The short-circuit detecting function-equipped scanning display according to claim 3, wherein: The data device further comprises a pulse width control unit electrically connected to the scanning control unit, and the current driving circuit and the detection circuit of each driving unit, generating and outputting the pulse width control signal required by each current driving circuit and the detection timing signal required by each detection circuit, and receiving the detection result from the detection circuit and outputting to the scanning control unit.

6. The scanning display with short-circuit detection function according to claim 3, wherein: the data device further comprises a pulse width control unit electrically connected to the current driving circuit and the detection circuit of each driving unit, generating and outputting the pulse width control signal required by each current driving circuit and the detection timing signal required by each detection circuit, and The scan control unit is electrically connected to the detection circuit of the driving unit to receive the detection results.

7. The short-circuit detecting function-equipped scanning display according to claim 3, wherein: Each scan period of each scan unit comprises a scan interval and a clamp interval, in each scan period of each scan unit, The scan signal and the clamp signal are complementary, in the scan interval, the scan signal has a conducting level, in the clamp interval, the scan signal has a non-conducting level, and The detection timing signal has a plurality of detection levels, the detection levels correspond to the scan intervals of the scan units respectively, the duration of each detection level changes with a change of a predetermined reference voltage, and the duration of each detection level is the same and less than each scan interval.

8. The short-circuit detecting function-equipped scanning display according to claim 7, wherein: In adjacent two scan units, an end point of the conducting level of the scan signal of the former scan unit corresponds to a start point of the conducting level of the scan signal of the next scan unit.

9. The short-circuit detecting function-equipped scanning display according to claim 7, wherein: When one of the detection results indicates that the corresponding data line is abnormal, the scan control unit adjusts the clamp signal corresponding to the current row scan in the clamp signal according to the detection results, so that in the scan interval of the current row scan, the clamp signal corresponding to the current row scan in the clamp signal maintains at the non-conducting level, in the clamp interval, the clamp signal corresponding to the current row scan in the clamp signal has the conducting level in a clamp conducting time, and the clamp conducting time is located in an initial period of the corresponding clamp interval.

10. The short-circuit detecting function-equipped scanning display according to claim 3, wherein Further comprising: a plurality of the display devices, the display devices are electrically connected in a matrix arrangement; and a plurality of the data devices, the data devices are sequentially connected, each data device is electrically connected to the corresponding display device, and a last data device is further electrically connected to the scan control unit of the scan device, the last data device receives the detection results generated by each of the remaining data devices, and transmits the received detection results and the detection results generated by itself to the scan control unit.

11. The short-circuit detecting function-equipped scanning display according to claim 10, wherein Further comprising: a plurality of the scan devices, each scan device is electrically connected to the corresponding display device; a last data device is electrically connected to the scan control unit of the scan device, and the last data device transmits the received detection results and the detection results generated by itself to the scan control unit of the scan device.

12. The short-circuit detecting function-equipped scanning display according to claim 3, wherein Further comprising: a plurality of the display devices, the display devices are electrically connected in a matrix arrangement; and a plurality of the data devices, each data device is electrically connected to the scan control unit of the scan device and the corresponding display device, and each data device transmits the generated detection results to the scan control unit. Further comprising:

13. The short-circuit detecting function-equipped scanning display according to claim 12, wherein a plurality of the scan devices, each scan device is electrically connected to the corresponding display device; each data device is electrically connected to the scan control unit of the scan device and the corresponding display device, and each data device transmits the generated detection results to the scan control unit. Further comprising:

14. The short-circuit detecting function-equipped scanning display according to claim 3, wherein a plurality of the display devices, the display devices are electrically connected in a matrix arrangement; and a plurality of the data devices, each data device is electrically connected to the scan control unit of the scan device and the corresponding display device, and each data device transmits the generated detection results to the scan control unit. a plurality of the scanning devices, the scanning control units of the scanning devices are sequentially connected in series, and each scanning device is electrically connected to the corresponding display device; and a plurality of the data devices, the data devices are sequentially connected in series, each data device is electrically connected to the corresponding display device, and a last data device is further electrically connected to the scanning control unit of a first scanning device of the scanning devices, the last data device receives the detection results generated by each of the remaining data devices of the data devices, and transmits the received detection results and the detection results generated by the last data device to the scanning control unit of the first scanning device, the scanning control unit of an i-th scanning device transmits the received detection results to the scanning control unit of an (i+1)-th scanning device, i is a positive integer, 1≦i≦N-1, and N is a total number of the scanning devices.

15. The short-circuit detecting function-equipped scanning display according to claim 3, wherein Further comprising: a plurality of the display devices, the display devices are electrically connected in a matrix arrangement; a plurality of the scanning devices, the scanning control units of the scanning devices are sequentially connected in series, and each scanning device is electrically connected to the corresponding display device; and a plurality of the data devices, each data device is electrically connected to the corresponding display device and the scanning control unit of a first scanning device of the scanning devices, each data device transmits the generated detection results to the scanning control unit of the first scanning device, and the scanning control unit of an i-th scanning device transmits the received detection results to the scanning control unit of an (i+1)-th scanning device, i is a positive integer, 1≦i≦N-1, and N is a total number of the scanning devices.

16. The short-circuit detecting function-equipped scanning display according to claim 3, wherein Further comprising: a plurality of the display devices, the display devices are electrically connected in a matrix arrangement; a control device electrically connected to the scanning control units of the scanning devices; and a plurality of the data devices, the data devices are sequentially connected in series, each data device is electrically connected to the corresponding display device, and a last data device is further electrically connected to the control device, the last data device receives the detection results generated by each of the remaining data devices of the data devices, and transmits the received detection results and the detection results generated by the last data device to the scanning control unit via the control device.

17. The short-circuit detecting function-equipped scanning display according to claim 16, wherein Further comprising: a plurality of the scanning devices, each scanning device is electrically connected to the corresponding display device; the control device is electrically connected to the scanning control units of each of the scanning devices, and the last data device transmits the received detection results and the detection results generated by the last data device to the scanning control units of the scanning devices via the control device.

18. The short-circuit detecting function-equipped scanning display according to claim 3, wherein Further comprising: a plurality of the display devices, the display devices are electrically connected in a matrix arrangement; a plurality of the scanning devices, the scanning control units of the scanning devices are sequentially connected in series, and each scanning device is electrically connected to the corresponding display device; a control device electrically connected to the scanning control unit of a first scanning device of the scanning devices; and a control device electrically connected to the scanning control unit of a first scanning device of the scanning devices; and A plurality of said data devices are sequentially connected in series, each of said data devices is electrically connected to a corresponding one of said display devices, and a last one of said data devices is further electrically connected to said control device, said last one of said data devices receives said detection results generated by each of the remaining ones of said data devices, and transmits said received detection results and said detection results generated by said last one of said data devices to a scan control unit of a first one of said scanning devices via said control device, a scan control unit of an i-th one of said scanning devices transmits said received detection results to a scan control unit of an (i+1)-th one of said scanning devices, i is a positive integer, 1≤i≤N-1, and N is a total number of said scanning devices.

19. A data device for a scanned display comprising an array of light emitting diodes of common anode architecture and a plurality of data lines, characterised by, The data device of the scanning display includes: A plurality of driving units, each of which includes, a current driving circuit having an output terminal electrically connected to a corresponding one of said data lines, and controlled by a pulse width control signal to generate one of a driving current and a first clamping voltage at the output terminal and output to the corresponding data line, and a detection circuit receiving a detection timing signal and detecting a voltage at the output terminal of the current driving circuit, and generating a detection result indicating whether the corresponding data line is abnormal according to the voltage at the output terminal and the detection timing signal; In each of the driving units, the detection circuit is electrically connected to the output terminal of the current driving circuit to detect the voltage at the output terminal, and the current driving circuit includes, a voltage stabilizer generating the first clamping voltage, an inverter receiving the pulse width control signal and generating an inverted signal according to the pulse width control signal, a constant current generator generating the driving current, a first switch having a first terminal electrically connected to the output terminal of the current driving circuit, and a second terminal electrically connected to the constant current generator to receive the driving current, the first switch being controlled by the pulse width control signal to be turned on or off, and outputting the driving current to the corresponding data line when turned on, and a second switch having a first terminal electrically connected to the voltage stabilizer to receive the first clamping voltage, and a second terminal electrically connected to the output terminal of the current driving circuit, the second switch being controlled by the inverted signal to be turned on or off, and outputting the first clamping voltage to the corresponding data line when turned on.

20. A data arrangement for a scanning display according to claim 19, characterized in that: In each of the driving units, the detection circuit includes, a comparator having a first input terminal for detecting the voltage at the output terminal of the current driving circuit, a second input terminal receiving a predetermined reference voltage, and an output terminal providing a comparison result between the voltage at the output terminal of the current driving circuit and the predetermined reference voltage, and a logic gate having a first input terminal electrically connected to the comparator to receive the comparison result, a second input terminal receiving the detection timing signal, and an output terminal, the logic gate generating the detection result at the output terminal according to the comparison result and the detection timing signal.

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