KR102649385B1 - Display panel device and controlling method thereof - Google Patents

Abstract

A display device according to an embodiment includes a pixel line, a gate driver for applying a preset voltage to the pixel line, a sensor for detecting an output voltage of the gate driver, and whether the gate driver is deteriorated based on the detected output voltage. and, if it is determined that the gate driver is deteriorated, may include a control unit that operates an additional gate drive corresponding to the gate driver.

Description

Display device and control method of the display device {DISPLAY PANEL DEVICE AND CONTROLLING METHOD THEREOF}

The present invention relates to a display device and a method of controlling the display device. More specifically, the present invention relates to a display device and a method of controlling the display device. More specifically, the present invention relates to a display device using a sensor mounted inside the display device to detect whether the gate driver of the display is deteriorated, and to determine whether the gate driver malfunctions due to deterioration. The invention relates to a technology that, if present, blocks the operation of the malfunctioning gate driver and then operates an additional gate driver to allow the gate driver to operate normally.

A display device, which is a liquid crystal display device, includes a substrate including a pixel electrode, a substrate including a common electrode, and a liquid crystal layer interposed between the substrates. The display device generates an electric field in the liquid crystal layer by applying voltage to the two electrodes. The color is displayed externally by controlling the intensity of this electric field and controlling the transmittance of light passing through the liquid crystal layer.

Specifically, the display device includes a display display and a display driver, and the display includes a plurality of gate lines and a plurality of data lines. And the display driver includes a gate driver that provides gate signals to the plurality of gate lines and a data driver that provides data voltages to the data lines.

The gate driver includes a gate driver circuit including a plurality of switching elements, and the switching elements may be implemented as thin film transistors.

The gate driver applies a high voltage to the gate electrode of the output pull-up switching element due to the bootstrap effect. Accordingly, a change in the threshold voltage of the pull-up switching device occurs, power consumption increases due to an increase in leakage current, and the output signal voltage is lowered, causing malfunction of the gate driving circuit.

Existing displays drive the gate driver (or gate driver) line-by-line to drive the display matrix, and are integrated within the display rather than an external integrated circuit (IC). The gate driver is placed on the bezel of the display. Therefore, mechanical/electrical stress on the display may cause malfunction of the gate driver inside the bezel, which can cause deterioration, and when deterioration occurs, there is a problem in which the pixels of the display are not displayed normally.

Korean Patent No. 10-2265368 ‘Pixel, display device including the same, and method of driving the same’ (published on July 22, 2016) Korean Patent Publication No. 10-2021-0057277 ‘Pixel of organic light emitting display device, and organic light emitting display device’ (published on May 21, 2021)

A display device and a control method of the display device according to an embodiment are an invention designed to solve the problems described above, and include a display device that compensates for malfunction of the gate driver due to deterioration of the gate driver in the panel of the display device, and The object is to provide a method for controlling a display device.

Specifically, the display device and the control method of the display device according to one embodiment detect the form of the output voltage of the gate driver with a sensor unit, determine whether the gate driver is malfunctioning based on the detected result, and determine whether the gate driver is malfunctioning. The purpose is to provide a display device and a display device control method that can more quickly resolve malfunctions of the gate driver by operating the gate driver when a gate driver exists.

A display device according to an embodiment includes a pixel line, a gate driver for applying a preset voltage to the pixel line, a sensor for detecting an output voltage of the gate driver, and whether the gate driver is deteriorated based on the detected output voltage. and, if it is determined that the gate driver is deteriorated, may include a control unit that operates an additional gate drive corresponding to the gate driver.

The sensor may determine whether the gate driver is deteriorated based on whether the waveform of the output voltage of the gate driver deviates from a preset waveform.

The sensor may determine that the gate driver is deteriorated when the magnitude of the output voltage of the gate driver does not change for a preset time.

The sensor may determine that the gate driver is deteriorated when the output of the gate driver is fixed to a specific value for a preset time.

The sensor may determine that the gate driver is deteriorated when the magnitude of the output voltage of the gate driver is output at a fixed value for a preset time.

The display device further includes a first switch that turns on/off the output of the gate driver, and when the controller determines that the gate dry is deteriorated, it turns off the switch to turn the output of the gate driver on. You can block it.

In the display device, a pixel line to which the gate drive voltage is applied may be the same as a pixel line to which a voltage of an additional gate driver corresponding to the gate driver is applied.

The gate driver may be placed on a first bezel located on one side of the display panel, and the additional gate drive and the sensor may be placed on a second bezel located on the other side of the display panel.

The gate driver, the additional gate driver, and the sensor are disposed on a first bezel located on one side of the display panel, and the gate driver and the additional gate driver may be arranged symmetrically with respect to the sensor. .

The display device further includes a first switch that controls on/off the output of the gate drive and a second switch that controls the on/off output of the additional gate drive, and the pixel line is connected to the first switch. And it may be connected to the second switch.

The sensor may include a flip-flop, comparator, XOR, or inverter.

A display device according to another embodiment includes a plurality of pixel lines, a gate driver unit including a plurality of gate drivers that apply preset voltages to each of the plurality of pixel lines, and a plurality of additional pixel lines each connected to the plurality of pixel lines. An additional gate driver unit including a gate driver, a sensor unit including a plurality of sensors that respectively detect output voltages of the plurality of drivers, and determining whether the plurality of gate drivers are deteriorated based on a detection result of the sensor unit, When a deteriorated gate driver exists among the plurality of gate drivers, the control unit may block the operation of the deteriorated gate driver and operate an additional gate drive corresponding to the deteriorated gate driver.

The plurality of pixel lines include a first pixel line and a second pixel line, and the gate driver unit includes a first gate driver and a second pixel line that apply preset voltages to the first pixel line and the second pixel line, respectively. It includes two gate drivers, and the additional gate driver unit includes a first additional gate driver and a second additional gate driver respectively connected to the first pixel line and the second pixel line, and the sensor includes the first additional gate driver. It may include a first sensor and a second sensor that sense the output voltages of the first gate driver and the second gate driver, respectively.

A method of controlling a display device according to an embodiment includes a plurality of gate drivers and a plurality of additional gate drivers each connected to a plurality of pixel lines, using the plurality of gate drivers. Applying a plurality of preset voltages, detecting output voltages of the plurality of gate drivers using a plurality of sensors, and determining whether a deteriorated gate driver exists among the gate drivers based on the results detected by the plurality of sensors. determining and, if the deteriorated gate driver exists, generating a phase signal of the deteriorated gate driver, blocking operation of the deteriorated gate driver, and operating an additional gate drive corresponding to the deteriorated gate driver. It can be included.

The sensor may include a flip-flop, XOR, comparator, or inverter.

The display device according to one embodiment has the effect of preventing a blackout phenomenon of the display device at an early stage by immediately compensating for the malfunction of the gate driver in the display panel.

Specifically, in the display device according to one embodiment, when malfunction of the gate driver occurs due to deterioration of the device itself within the display device or deterioration of the gate driver of the display device due to various stresses such as electrical stress, mechanical stress, and optical stress. , By operating an additional gate driver, gate driver malfunction can be compensated, thereby providing a gate driver that is more resistant to stress.

Accordingly, the display device according to one embodiment can easily detect the deterioration of the deteriorated gate driver and effectively compensate for it, so it is not subject to a lot of mechanical and electrical stress like a flexible, foldable, or stretchable display device. There is an advantage in that the durability of the received display panel can be secured more easily than in the prior art.

In addition, the display device according to one embodiment compensates for malfunction of the gate drive by adding only an additional gate display device and sensor inside the bezel on one side of the display device, minimizing the size of the bezel and at the same time reducing the size of the gate driver. There is an advantage in being able to quickly compensate for malfunctions.

1 is a block diagram showing internal components of a display device according to the prior art.
FIG. 2 is a diagram illustrating a situation in which deterioration occurs in a gate driver of a display device.
Figure 3 is a diagram showing a situation in which blackout occurs in a display device due to gate driver deterioration.
Figure 4 is a diagram showing the internal structure of a display device according to an embodiment of the present invention and a waveform output when the display device operates normally.
Figure 5 is a diagram illustrating a case where gate driver deterioration occurs according to an embodiment of the present invention.
Figure 6 is a diagram showing various waveforms that can be output from the gate driver when deterioration occurs in the gate driver.
Figure 7 is a diagram showing the internal structure of a display device according to another embodiment of the present invention.
Figure 8 is a diagram showing a circuit diagram when the sensor according to the present invention is implemented including a flip-flop.
Figure 9 is a diagram showing a circuit diagram when the sensor according to the present invention is implemented including an invertor sensor.
Figure 10 is a diagram showing a circuit diagram when the sensor according to the present invention is implemented including a comparator.
Figure 11 is a diagram showing a circuit diagram when the sensor according to the present invention is implemented including XOR.

Hereinafter, embodiments according to the present invention will be described with reference to the attached drawings. When adding reference signs to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing embodiments of the present invention, if detailed descriptions of related known configurations or functions are judged to impede understanding of the embodiments of the present invention, the detailed descriptions will be omitted. In addition, embodiments of the present invention will be described below, but the technical idea of the present invention is not limited or limited thereto and may be modified and implemented in various ways by those skilled in the art.

Additionally, the terms used in this specification are used to describe embodiments and are not intended to limit and/or limit the disclosed invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, terms such as “comprise,” “provide,” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification. It does not exclude in advance the existence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof.

In addition, throughout the specification, when a part is said to be “connected” to another part, this refers not only to the case where it is “directly connected” but also to the case where it is “indirectly connected” with another element in between. Terms including ordinal numbers, such as “first” and “second,” used in this specification may be used to describe various components, but the components are not limited by the terms.

Below, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention.

Figure 1 is a block diagram showing a display device according to the prior art, Figure 2 is a diagram showing a situation in which deterioration occurs in the gate driver of the display device, and Figure 3 shows blackout in the display device due to the deterioration of the gate driver. This is a drawing showing the situation that occurred.

Referring to FIG. 1, a display panel 10 according to the prior art may include a bezel 20 including a plurality of gate drivers and pixels 30 driven by each gate driver.

The bezel 20 may include a plurality of gate drivers 21, 22, 23, and 24. Although a total of four gate drivers are shown in Figures 1 and 2 due to space limitations, the number of gate drivers included in the display may increase depending on the size of the display panel.

The first gate driver 21 may supply power to the first pixel line 31, and the second gate driver 22 may supply power to the second pixel line 32. Therefore, when N gate drivers are included in the display panel 10, the N gate driver can supply power to the N pixel line among the plurality of pixel lines in the pixel. And, when the gate drivers operate normally, the output voltages of the gate drivers may output pulse waves 41, 42, 43, and 44 having a constant period as shown in FIG. 2.

Meanwhile, the display panel 10 can be driven line-by-line only by each gate driver included in the bezel 20 of the display panel 10 to drive a matrix, which is a collection of pixel lines within a pixel.

As shown in FIG. 2, when deterioration occurs in the second gate driver 22 among the plurality of gate drivers 21, 22, 23, and 24 included in the bezel 20 of the display panel 10, the plurality of Among the pixel lines 31, 32, 33, and 34, stress occurs in the second pixel line 32, which is electrically connected to the second gate driver 22. If this stress continues, the second pixel Line 32 may be a stress line that does not operate normally. And, if one pixel within a plurality of pixels is stressed and does not function properly, a black out phenomenon may occur in the N pixel line 32, as shown in (a) of FIG. 3. there is.

In addition, when a blackout phenomenon occurs, the display generally has an active matrix structure and operates sequentially for each channel (line-by-line), so the output of the N channel goes into the input of the N+1 channel. there is. Therefore, if the gate driver of one channel is deteriorated and cannot operate normally, the gate driver of that channel continues to receive malfunctioning input signals, making normal operation impossible.

Therefore, when deterioration occurs in the second gate driver 22 and a blackout phenomenon occurs in the second pixel line 32, the voltage is higher than that of the second pixel line 32 as shown in (b) of FIG. 3. The screen 41 for the pixels above operates normally, but the N+1 pixel line and N+2 pixel line below the 2nd pixel line 32 are affected by the 2nd pixel line 32. Therefore, as shown in (b) of FIG. 3, a problem occurs in which all pixels of the screen 42 below the second pixel line 32 are blacked out.

Therefore, the display device and the control method of the display device according to one embodiment are an invention designed to solve the problem described above. When a deterioration phenomenon that causes malfunction of the gate driver is detected in the display panel, the deteriorated gate driver The purpose is to provide a display device and a control method of the display device that can more quickly resolve malfunctions of the gate driver by changing the electrical signal input to the device. The structure and specific features of the present invention will be described through the drawings below.

Figure 4 is a diagram illustrating the internal structure of a display device according to an embodiment of the present invention and a waveform output when the display device is normally operated, and Figure 5 is a diagram illustrating a waveform in which deterioration of the gate driver occurs according to an embodiment of the present invention. This is a drawing showing a case. Figure 6 is a diagram showing various waveforms that can be output from the gate driver when deterioration occurs in the gate driver.

Referring to (A) of FIG. 4, the display device 100 according to an embodiment may include a display panel 110 and a control unit (not shown) that controls various components within the display panel 110, The display panel 110 includes a first bezel 120 including a plurality of gate drivers 121 to 123, a plurality of sensors 131 to 133, and a plurality of additional gate drivers 161 to 163. It may include a pixel 140 including two bezels 160 and a plurality of pixel lines 141 to 143 driven by each gate driver.

Specifically, the first bezel 120 includes a first gate driver 121 that applies a preset voltage to the first pixel line 141 and a second gate driver that applies a preset voltage to the second pixel line 142. 122 and a third gate driver 123 that applies a preset voltage to the third pixel line 143.

The second bezel 160 is a first gate additional driver 161 capable of applying a voltage to the same pixel line as the first gate driver 121, and a first gate additional driver 161 capable of applying a voltage to the same pixel line as the second gate driver 122. a second gate additional driver 162 capable of applying a voltage to the same pixel line as the third gate driver 123, a first gate driver 121, and a first additional gate A first sensor 131 that senses the output voltage of the driver 161, a second sensor 132 that senses the output voltage of the second gate driver 122 and the second additional gate driver 162, and a third gate driver. It may include (123) and a third sensor 133 that senses the output voltage of the third additional gate driver 163.

In Figure 4, due to space limitations, the number of gate drivers and sensors is limited to three, but the embodiment of the present invention is not limited to this, and N more than three pixels are used according to the number of pixels of the display panel 110. It can be equipped with a gate driver, N additional gate drivers and N sensors. The purpose of this arrangement is to prevent the gate driver and the additional gate driver from malfunctioning at the same time due to mechanical stress. The detailed operating process for this will be described later.

Meanwhile, for convenience of description below, a configuration including a plurality of gate drivers is referred to as a gate driver unit, a configuration including a plurality of additional gate drivers is referred to as an additional gate driver section, and a configuration including a plurality of sensors is referred to as a gate driver unit. This will be explained by referring to it as the sensor unit.

The first sensor 131 may detect the output voltage of the first gate driver 121 or the first additional gate driver 161 and transmit the detected result to the control unit. If the first gate driver 121 operates normally, the waveform of the output voltage of the first gate driver 121 is output as the waveform 151 shown in FIG. 4(b). In this case, the first gate driver 121 normally operates. Since 121 is operating, the sensor does not output any result, and the first additional gate driver 161, which can apply a voltage to the same pixel line as the first gate driver 121, does not operate.

Therefore, if all gate drivers including the second gate driver 122 and the third gate driver 123 operate normally, normal output waveforms 151, 152, and 153 are output as shown in (A) of FIG. 4. The first sensor 131, the second sensor 132, and the third sensor 133 can detect these waveforms and transmit the detected results to the processor.

Meanwhile, although not shown in the drawing, a switch that can block the voltage of the gate driver applied to the pixel line is included between the gate driver and the pixel line connected to the gate driver. This is a component that prevents power from being supplied to pixel lines connected to gate drivers where deterioration has occurred, and the switch may be arranged to be connected to a plurality of gate drivers as many as the number of gate drivers. Since the additional gate driver may also experience deterioration, in this case, a plurality of switches may be provided to the pixel line connected to the additional gate driver so that the deteriorated additional gate can no longer apply voltage. For convenience of explanation, the switch connected to the gate driver will be referred to as the first switch, and the switch connected to the additional gate driver will be referred to as the second switch.

The control unit is a component that controls the overall operation of the display device 100 and can control the operation of gate drivers, additional gate drivers, switches, and sensors. The control unit may control the operation of a plurality of gate drivers based on results received from sensors present in the display panel 110. The control unit according to the present invention is a processor, may be implemented in the form of an integrated circuit (IC), and may be located inside the display panel 110.

The control unit can determine whether the gate driver is operating normally based on the results collected from the sensors.

Referring to (B) of FIG. 4, if the first gate driver 121 is operating normally, the output voltage is a specific value (1V) in a specific period (t1 to t2) as shown in the figure. Since this waveform is a normal waveform, the first sensor 131 does not output a special value and outputs the sensing value as 0 in all sections. Therefore, if the sensing value of the first sensor 131 received by the first sensor 131 is 0 in all sections, the control unit may determine that the first gate driver 121 is operating normally, and this In this case, no compensation signal is generated. Throughout this specification, the specific value of the pulse form periodically output by the gate driver is limited to 1V for convenience of explanation. The magnitude of the voltage output when the gate driver operates normally is 1V. It may vary depending on the manufacturing environment.

However, as shown in FIG. 5, when deterioration occurs in the second gate driver 122, the second gate driver 122 cannot output a normal voltage waveform, so the voltage output from the second gate driver 122 The waveform 152 outputs a waveform of a different form from the waveforms (periodically pulse-shaped waveforms 151 and 153) output from the first gate driver 121 and the third gate driver 123. In this case, since the second gate driver 122 does not output voltage normally, normal power is not supplied to the second pixel line 142 connected to the second gate driver 122, causing the blackout phenomenon described above. It happens.

Therefore, in this case, the control unit according to the present invention determines that the second gate driver 122 is not operating normally and prevents the second gate driver 122 from supplying any more voltage to the second pixel line 142. After blocking the output of the second gate driver 122 using the switch connected to the second gate driver 122, the second additional gate driver 162, which is another gate driver connected to the second pixel line, is turned on. By operating it, voltage is normally applied to the second pixel line 142, so that the entire display device 100 can operate normally. Through the drawings below, we will find out the type in which the gate driver cannot output voltage normally due to deterioration, and learn about the operation of the additional gate driver accordingly.

FIG. 6 is a diagram showing various waveforms that can be output from the gate driver when deterioration occurs in the gate driver. Specifically, (A) in FIG. 6 is the output when the deteriorated gate driver output value is fixed to '0'. It is a diagram showing the waveform and the corresponding output values of the sensor and additional gate driver. Figure 6 (B) shows the waveform output when the deteriorated gate driver output value is fixed to '1' and the corresponding sensor and additional gate driver output values. This is a diagram showing the output value of the driver, and Figure 6 (C) is a diagram showing the waveform when the deteriorated gate driver output waveform is output as a delayed waveform and the corresponding output values of the sensor and additional gate driver.

As shown in (A) of FIG. 6, when deterioration occurs in the first gate driver 121 and the output voltage value of the first gate driver 121 is fixed to 0V, the first sensor 131 Since the output value of the first gate driver 121 must exist in a specific section (t1-t2), output information is generated by setting the sensing value to 1 in the t1-t2 section, and the generated information is transmitted to the control unit. can do. And the control unit that receives this information determines that the first gate driver 121 is not operating normally, and uses the 1-1 switch connected to the first gate driver 121 to control the first gate driver 121. blocks the operation, and the first gate driver 121 operates the first additional gate driver 161 connected to the first pixel line 141 that drives the voltage, so that the first additional gate driver 161 operates the first additional gate driver 161. A voltage can be applied to the 1 pixel line 141.

Meanwhile, if the first gate driver 121 is deteriorated and does not operate normally, the output voltage value of the first gate driver 121 may be fixed at 1V as shown in (B) of FIG. 6 and continue to be output. there is. In this case, the voltage is output at a specific value even though it should be output at 0V in sections other than the specific section (t1-t2), so the first sensor 131 uses the sensing value with this information as output information and transmits it to the control unit. You can. And the control unit that receives this information determines that the first gate driver 121 is not operating normally, and uses the 1-1 switch connected to the first gate driver 121 to control the first gate driver 121. blocks the operation, and the first gate driver 121 operates the first additional gate driver 161 connected to the first pixel line 141 that drives the voltage, so that the first additional gate driver 161 operates the first additional gate driver 161. A voltage can be applied to the 1 pixel line 141.

Meanwhile, for convenience of explanation, in (b) of FIG. 6, it is assumed that when the output value of the first gate driver 121 is continuously fixed to 0, the value output by the first sensor 131 is 1. The voltage value at which the control unit according to the invention determines that the output voltage of the gate driver is abnormally output may be values other than 0 and 1, and may also be applied to embodiments of the present invention.

Meanwhile, there are cases where the first gate driver 121 does not operate normally and the output voltage value of the first gate driver 121 is output later than normal, as shown in (C) of FIG. 6. , In this case, the first sensor 131 may output information that the output voltage is not operating normally in a specific section (X1) and transmit the generated output information to the control unit. And the control unit that receives this information determines that the first gate driver 121 is not operating normally, and uses the 1-1 switch connected to the first gate driver 121 to control the first gate driver 121. blocks the operation, and the first gate driver 121 operates the first additional gate driver 161 connected to the first pixel line 141 that drives the voltage, so that the first additional gate driver 161 operates the first additional gate driver 161. A voltage can be applied to the 1 pixel line 141. Meanwhile, although not shown in FIG. 8, the oscillation waveform in which the output voltage of the gate driver repeatedly outputs 0 and 1 is also not a normal output voltage, so this waveform is also judged to be a waveform in which the gate drive is not operating normally. can do.

That is, the display device 100 according to the present invention easily determines whether the gate driver is deteriorated based on the output waveform, and when a gate driver with deterioration exists, the pixel connected to the gate driver with deterioration occurs. This method of applying voltage to the pixel line using an additional gate driver connected to the line has the advantage of solving the problem of gate driver deterioration more effectively than the prior art.

Figure 7 is a diagram showing the internal structure of a display device according to another embodiment of the present invention.

Referring to FIG. 7, the display device 100 according to an embodiment may include a display panel 110 and a control unit (not shown) that controls various components within the display panel 110. ) is a first bezel 120 including a plurality of gate drivers 121 to 123, a plurality of sensors 131 to 133, and a plurality of additional gate drivers 161 to 163, and a plurality of gate drivers 121 to 163. It may include a control unit that controls pixels and gate drivers including a plurality of pixel lines 141 to 143 driven by 123), sensors, additional gate drivers, etc. The display device 100 according to FIG. 7 has the same basic structure and operating principle as the display device 100 according to FIG. 4, but the display device 100 according to FIG. 7 is different from the display device 100 according to FIG. 4. The second bezel 160 may not be included, and a plurality of sensors and a plurality of additional gate drivers may all be included in the first bezel 120.

The display device 100 according to the present invention has a gate driver and an additional gate driver each connected to a pixel line, so that when the gate driver does not operate normally, the additional gate driver operates, and when the additional gate driver does not operate normally, Problems caused by deterioration can be prevented by operating the gate driver. However, if both the gate driver and the additional gate driver deteriorate, a problem occurs in which power cannot be supplied to the pixel line by any of the gate drivers.

However, in the case of deterioration due to mechanical stress, it does not affect all surfaces of the display device simultaneously but often occurs concentrated only in specific locations, so considering these characteristics has the advantage of reducing the possibility of the gate driver not operating due to deterioration. This exists. That is, as shown in FIG. 4, when the gate driver is located on the first bezel 120 and the additional gate driver is located on the second bezel 160 that is physically symmetrical to the first bezel, mechanical Because stress occurs locally, it is unlikely to act on both the first bezel 120 and the second bezel 160, so the possibility that both the gate driver and the additional gate driver do not operate normally is reduced.

In addition, as shown in FIG. 7, even if the gate driver and the additional gate driver are placed on the first bezel 120, which is the same bezel, the gate drivers and the additional gate drivers are positioned symmetrically upward and downward, rather than at the same position even on the same bezel. Since the additional gate driver is disposed, there is a low possibility that both the gate driver and the additional gate driver will deteriorate, and the operating method according to the present invention can be applied more effectively.

So far, we have explained how the control unit generates a compensation signal for each type of gate driver malfunction. Below, we will look at various structures for sensors that can be used in the present invention by embodiment.

Figure 8 is a diagram showing a circuit diagram when the sensor according to the present invention is implemented including a flip-flop.

Referring to FIG. 8, when the sensor of the present invention is implemented including the flip-flop 171, the second gate driver 122 is connected to the 2-1 switch (T21), and the second additional gate driver 162 ) may be connected to the 2-2 switch (T22), and the second sensor 132 may detect the output voltage of the second gate driver 122.

As shown in FIG. 8, when the sensor is configured to include a flip-flop, the flip-flop 171 can detect toggling of the signal, so when the output of the gate driver is fixed at 0 or 1, there is no toggling. Therefore, through this, it is possible to determine whether the gate driver is abnormal. In addition, when the output oscillates, this can be detected because toggling occurs several times. When the output is fixed at 1, toggling occurs due to noise, so this can also be detected. Lastly, even if a slowdown in the output voltage occurs, this can also be detected because a delay occurs until it is lower than the logical threshold of the signal.

Figure 9 is a diagram showing a circuit diagram when the sensor according to the present invention is implemented including an invertor sensor.

Referring to FIG. 9, when the sensor according to the present invention is implemented including the first inverter 173, the second gate driver 122 is connected to the 2-1 switch (T21), and the second additional gate driver (162) is connected to the 2-2 switch (T22), the first inverter 173 can be connected between the 2-1 switch (T21) and the 2-2 switch (T22), and the second sensor ( 132) can sense the output voltage of the second gate driver 122 using the first inverter 173.

Figure 10 is a diagram showing a circuit diagram when the sensor according to the present invention is implemented including a comparator.

Referring to FIG. 10, when the sensor according to the present invention is implemented including the comparator 174, the second gate driver 122 is connected to the 2-1 switch (T21), and the second additional gate driver 162 ) is connected to the 2-2 switch (T22), and the comparator 174 may be connected between the 2-1 switch (T21) and the 2-2 switch (T22). Accordingly, the second sensor 132 can sense the output voltage of the second gate driver 122 using the comparator 174.

Figure 11 is a diagram showing a circuit diagram when the sensor according to the present invention is implemented including XOR.

Referring to FIG. 11, when the sensor according to the present invention is implemented including the XOR (175), due to the characteristics of the 175), the output signal of do.

So far, we have looked at the display device and the control method of the display device according to the present invention in detail through the drawings.

The display device according to one embodiment has the effect of preventing a blackout phenomenon of the display device at an early stage by immediately compensating for the malfunction of the gate driver in the display panel.

Specifically, in the display device according to one embodiment, when malfunction of the gate driver occurs due to deterioration of the device itself within the display device or deterioration of the gate driver of the display device due to various stresses such as electrical stress, mechanical stress, and optical stress. , By operating an additional gate driver, gate driver malfunction can be compensated, thereby providing a gate driver that is more resistant to stress.

Accordingly, the display device according to one embodiment can easily detect the deterioration of the deteriorated gate driver and effectively compensate for it, so it is not subject to a lot of mechanical and electrical stress like a flexible, foldable, or stretchable display device. There is an advantage in that the durability of the received display panel can be secured more easily than in the prior art.

In addition, the display device according to one embodiment compensates for malfunction of the gate drive by adding only an additional gate display device and sensor inside the bezel on one side of the display device, minimizing the size of the bezel and at the same time reducing the size of the gate driver. There is an advantage in being able to quickly compensate for malfunctions.

The device described above may be implemented with hardware components, software components, and/or a combination of hardware components and software components. For example, devices and components described in embodiments may include, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA), It may be implemented using one or more general-purpose or special-purpose computers, such as a programmable logic unit (PLU), microprocessor, or any other device capable of executing and responding to instructions. A processing device may perform an operating system (OS) and one or more software applications that run on the operating system. Additionally, a processing device may access, store, manipulate, process, and generate data in response to execution of software. For ease of understanding, a single processing device may be described as being used; however, those skilled in the art will understand that a processing device includes multiple processing elements and/or multiple types of processing elements. It can be seen that it may include. For example, a processing device may include multiple processors or one processor and one controller. Additionally, other processing configurations, such as parallel processors, are possible.

Software may include a computer program, code, instructions, or a combination of one or more of these, which may configure a processing unit to operate as desired, or may be processed independently or collectively. You can command the device. Software and/or data may be used on any type of machine, component, physical device, virtual equipment, computer storage medium or device to be interpreted by or to provide instructions or data to a processing device. It can be embodied in . Software may be distributed over networked computer systems and thus stored or executed in a distributed manner. Software and data may be stored on one or more computer-readable recording media.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., singly or in combination. Program instructions recorded on the medium may be specially designed and configured for the embodiment or may be known and available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -Includes optical media (magneto-optical media) and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. Examples of program instructions include machine language code, such as that produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc.

As described above, although the embodiments have been described with limited examples and drawings, various modifications and variations can be made by those skilled in the art from the above description. For example, the described techniques are performed in a different order than the described method, and/or components of the described system, structure, device, circuit, etc. are combined or combined in a different form than the described method, or other components are used. Alternatively, appropriate results may be achieved even if substituted or substituted by an equivalent. Therefore, other implementations, other embodiments, and equivalents of the claims also fall within the scope of the claims described below.

100: display device 110: display panel
120: first bezel 121: first gate driver
122: second gate driver 123: third gate driver
130: Pixel 131: First sensor
132: second sensor 133: third sensor
161: first gate driver 162: second gate driver
163: Third gate driver

Claims (15)

pixel line;
a gate driver that applies a preset voltage to the pixel line;
A sensor that detects the output voltage of the gate driver;
a control unit that determines whether the gate driver is deteriorated based on the detected output voltage and, when it is determined that the gate driver is deteriorated, operates an additional gate drive corresponding to the gate driver;
The sensor is,
A display device that determines that the gate driver is deteriorated when the magnitude of the output voltage of the gate driver does not change for a preset time or is fixed to a specific value and is repeatedly output. According to paragraph 1,
The sensor is,
A display device that determines whether the gate driver is deteriorated based on whether the waveform of the output voltage of the gate driver deviates from a preset waveform. delete delete delete According to paragraph 1,
It further includes a first switch that turns on/off the output of the gate drive,
When the control unit determines that the gate drying is deteriorated, the control unit turns off the first switch to block the output of the gate driver. According to paragraph 1,
A display device, wherein a pixel line to which the gate drive voltage is applied and a pixel line to which the voltage of an additional gate driver corresponding to the gate driver is applied are the same pixel line. According to paragraph 1,
The gate driver is disposed on a first bezel located on one side of the display panel,
The additional gate drive and the sensor are disposed on a second bezel located on the other side of the display panel. According to clause 8,
The gate driver, the additional gate driver, and the sensor are included in a first bezel located on one side of the display panel,
The display device wherein the gate driver and the additional gate driver are arranged symmetrically with respect to the sensor. According to paragraph 1,
a first switch that controls on/off the output of the gate drive; and
It further includes a second switch that controls on/off the output of the additional gate drive,
The pixel line is connected to the first switch and the second switch. According to paragraph 1,
The sensor is,
A display device comprising a flip-flop, comparator, XOR or inverter. multiple pixel lines;
a gate driver unit including a plurality of gate drivers that apply a preset voltage to each of the plurality of pixel lines;
an additional gate driver unit including a plurality of additional gate drivers each connected to the plurality of pixel lines;
a sensor unit including a plurality of sensors that respectively detect output voltages of the plurality of drivers;
Based on the detection result of the sensor unit, it is determined whether the plurality of gate drivers are deteriorated, and if a deteriorated gate driver exists among the plurality of gate drivers, the operation of the deteriorated gate driver is blocked, and the deteriorated gate driver is blocked. It includes a control unit that operates the additional gate drive corresponding to,
The sensor unit,
A display device that determines that the gate driver is deteriorated when the magnitude of the output voltage of the gate driver does not change for a preset time or is fixed to a specific value and is repeatedly output. According to clause 12,
The plurality of pixel lines include a first pixel line and a second pixel line,
The gate driver unit includes a first gate driver and a second gate driver that apply preset voltages to the first pixel line and the second pixel line, respectively,
The additional gate driver unit includes a first additional gate driver and a second additional gate driver respectively connected to the first pixel line and the second pixel line,
The sensor includes a first sensor and a second sensor that detect output voltages of the first gate driver and the second gate driver, respectively. A method of controlling a display including a plurality of gate drivers and a plurality of additional gate drivers each connected to a plurality of pixel lines,
applying a preset voltage to the plurality of gate drivers using the plurality of gate drivers;
detecting output voltages of the plurality of gate drivers using a plurality of sensors;
determining whether a deteriorated gate driver exists among the gate drivers based on results detected by the plurality of sensors;
If the deteriorated gate driver exists, blocking the operation of the deteriorated gate driver and operating an additional gate drive corresponding to the deteriorated gate driver; and
The step of determining whether the deteriorated gate driver exists is,
If the magnitude of the output voltage of the gate driver does not change for a preset time or is fixed to a specific value and is repeatedly output, determining that the gate driver is deteriorated. According to clause 14,
The sensor is,
A method of controlling a display device, including a flip-flop, XOR, comparator or inverter.