TWI682224B - Light-emitting module, driving chip, and driving method - Google Patents

Abstract

A light-emitting module including substrate, driving chip, at least a light-emitting device, and a flexible printed circuit (FPC) is provided. The driving chip is disposed on the substrate through COG, or disposed on the FPC through COF or TCP, and the light emitting device is disposed on the substrate and connected to the driving chip. The driving chip provides data signal and second driving signal to the light emitting device. The light emitting device include micro light emitting diode or mini light emitting diode. A driving chip and a driving method are also provided.

Description

Light emitting module, driving chip and driving method

The invention relates to a light-emitting module, a driving chip and a driving method; in particular, it relates to a light-emitting module including a micro LED or a sub-millimeter LED (mini LED), and can be applied to a micro Driving chip and driving method of light-emitting diode or sub-millimeter light-emitting diode.

With the development of semiconductor light sources, light-emitting diodes (Light Emitting Diodes, LEDs) have been used in edge-lit backlight modules and direct-lit backlight modules in display devices, and can even be directly formed as pixels to provide display images. In the existing display device, a more direct-lit backlight is formed with more and smaller LEDs, and at the same time, a local dimming function is provided corresponding to the display screen to improve the contrast of the screen and the details of the dark parts.

However, in existing optical modules such as a backlight module or a display module including multiple light-emitting diodes, the volume and brightness of the optical module are limited by the driving circuit. When a circuit for individually controlling the light-emitting diode is formed on the substrate, the current of the circuit is limited by the thin film transistor (Thin Film Transistor, TFT), so the current used to drive the light-emitting diode cannot be too large, and the light-emitting diode The brightness of the body will therefore be limited.

When the control switch of the light emitting diode is formed on the circuit board outside the substrate, the Although the dynamic current can be higher, the volume of the driving chip will also increase with the number of LEDs. When the backlight module or display module of the above-mentioned light-emitting diode is applied to a device such as a screen, a mobile phone, or a notebook computer, the driving chip will not reduce the overall volume of the device, and even cause such a display module or backlight module Groups cannot be used in portable electronic devices.

The invention provides a light-emitting module with good light-emitting efficiency, which can also reduce the volume of the external components of the substrate, self-detect and correct the light-emitting effect.

The invention provides a driving chip and a driving method which can drive a light-emitting element in multiple modes, and it can also self-detect and correct to make the light-emitting element provide a stable optical effect.

The light-emitting module of the present invention includes a substrate, a driving chip, at least one light-emitting unit, and a flexible printed circuit board. The driving chip is arranged on the substrate in the COG (Chip on Glass) method, or on the flexible printed circuit board in the COF (Chip on Film) or TCP (Tape Carrier Package) method, and the light emitting unit is arranged on the substrate and connected Drive the chip. The driving chip provides a data signal or a second driving signal to the light-emitting unit. The light-emitting unit includes a micro-light emitting diode or a sub-millimeter light emitting diode.

The driving chip of the present invention is suitable for being arranged on a substrate in a COG manner and driving at least one light-emitting unit, and the light-emitting unit includes a micro-light emitting diode or a sub-millimeter light emitting diode. The driving chip includes a control unit and a plurality of sets of first switches and second switches, and the driving chip can be driven in an active driving mode or a passive driving mode.

When the driving chip is in the active driving mode, and each light-emitting unit includes a first light-emitting switch and a second light-emitting switch, the drive chip provides a data signal and a clock control signal from the control unit. The clock control signal is suitable for a gate drive circuit to provide a first scan signal To enable the first light-emitting switch, the data signal is suitable for enabling the second light-emitting switch, so that the light-emitting unit can receive a first drive signal from a power line through the second light-emitting switch.

When the driving chip is in the passive driving mode, and each first switch receives the second driving signal from a light source power source. The driving chip self-control unit provides a second scan signal to enable the first switch, and provides a third scan signal to enable the second switch, so that the light-emitting element connected between the first switch and the second switch receives the second drive Signal.

The driving method of the present invention is used to drive the above-mentioned light emitting module. The driving method includes: when the light-emitting unit further includes a first light-emitting switch and a second light-emitting switch connected to the micro-light-emitting diode or the sub-millimeter light-emitting diode, the driving chip drives the light-emitting unit in an active driving mode. The driving chip provides a data signal and a clock control signal. The clock control signal is suitable for the gate drive circuit to provide a first scan signal. The first scan signal is suitable for enabling the first light-emitting switch, and the data signal is suitable for enabling the second The light-emitting switch, so that the light-emitting unit can receive a first driving signal from a power line through the second light-emitting switch. When the light emitting unit is adapted to directly receive the second driving signal, the driving chip drives the light emitting unit in a passive driving mode, and encodes the second driving signal with at least one pulse width modulation switch.

As can be seen from the above, the light-emitting module proposed by the present invention can provide an optical effect with higher luminous efficiency and reduce the volume of the external components of the substrate by the COG driving chip, micro-light emitting diode and sub-millimeter light emitting diode . The driving chip proposed by the present invention can drive the light emitting element in an active driving mode and a passive driving mode, and can also be arranged on the substrate and connected to the light emitting element in a COG manner. The driving method proposed by the present invention can drive the light emitting element in an active driving mode and a passive driving mode.

Cs‧‧‧Capacitance

D1~D3‧‧‧Thickness

Data‧‧‧Data signal

Fault‧‧‧Error signal

Gate(n-1), Gate(n), Gate(n+1)‧‧‧‧Gate signal

ILED‧‧‧Drive current

Scan1, Scan2, Scan3 ‧‧‧ scan signal

T1~T6, T1-0~T6-0, T11, T12, PWM SW, PWM SW-0‧‧‧ switch

t0~t7‧‧‧time

Timing ctrl‧‧‧clock control signal

Vdd, Vss‧‧‧Power cord

Vch, VFB, V+‧‧‧Voltage

VLEDn-1, VLEDn, VLEDn+1 ‧‧‧ drive power signal

50,52,301,303‧‧‧Diffusion plate

51,53‧‧‧ LED

100,200‧‧‧light module

101‧‧‧ gate drive circuit

110,210‧‧‧ substrate

111,211A,211B‧‧‧Flexible printed circuit board

112,212A,212B‧‧‧component

120,220‧‧‧Lighting unit

121,221‧‧‧mm LEDs (mini LED)

122,222‧‧‧Luminous surface

122r1,122r2,222r1,222r2‧‧‧Lighting array

130, 230A, 230B ‧‧‧ driver chip

131,231‧‧‧Control unit

132,232‧‧‧Buffer

133,233‧‧‧sequence control circuit

134,234‧‧‧Shift register

135,235‧‧‧Line latch

136,236‧‧‧Electric displacement converter

137,237‧‧‧Digital to analog converter

140,240‧‧‧Protection unit

241,242,243‧‧‧Multiplexer

244,245‧‧‧Amplifier

246‧‧‧Comparator

247‧‧‧Logic unit

302,304 ‧‧‧ mm LED

1 is a schematic diagram of a light emitting module in the first embodiment of the present invention; FIG. 2 is a functional block and circuit schematic diagram of the light emitting module in the first embodiment of the present invention; FIG. 3 is a light emitting module in the first embodiment of the present invention Function block and circuit schematic diagram in repair state; FIG. 4 is a signal schematic diagram of the light emitting module in the first embodiment of the present invention; FIG. 5 is a partial flow schematic diagram of the driving method in the first embodiment of the present invention; FIG. 6A and FIG. 6B is a schematic view of the light emitting surface formed by the light emitting module of the first embodiment of the present invention; FIG. 7 is a schematic view of the light emitting module of the second embodiment of the present invention; FIG. 8 is a display module of the second embodiment of the present invention Functional block and schematic circuit diagram; FIG. 9 is a schematic circuit diagram of the light emitting module of the second embodiment of the present invention when repairing the signal of the second switch; FIGS. 10A and 10B are formed of the light emitting module of the second embodiment of the present invention 11 is a schematic diagram of the process of detecting and repairing the second switch in the second embodiment of the present invention; FIG. 12 is a circuit diagram of the light-emitting module of the second embodiment of the present invention when repairing the signal of the light-emitting unit FIG. 13 is a signal schematic diagram of a light emitting module of the second embodiment of the present invention when repairing a short-circuit light-emitting unit; FIG. 14 is a schematic flowchart of detecting and repairing a short-circuit light-emitting unit in a second embodiment of the present invention; FIG. 15 is the present invention Signal diagram of the light-emitting module of the second embodiment when repairing a broken light-emitting unit Figure 16 is a schematic diagram of the process of detecting and repairing a broken light-emitting unit in the second embodiment of the present invention; Figure 17 is a schematic diagram of the protection unit in the second embodiment of the present invention; Figure 18 is a backlight module of a conventional light-emitting diode And a cross-sectional view of a light-emitting module according to an embodiment of the invention.

The invention provides a driving chip and a light emitting module including the driving chip. The light-emitting module can be applied as a backlight module, thereby serving as a light source for a light valve such as a liquid crystal module, and preferably a backlight module that can provide local lighting (Local Dimming). The light emitting module can also be applied as a display module, which directly emits light to form a display screen, and the present invention is not limited to this application field.

It should be understood that although the terms "first", "second", etc. may be used herein to describe various elements, components or parts, these elements, components or parts should not be limited by these terms. These terms are only used to distinguish one element, component or section. Therefore, the "first component", "first component", "first switch", "first signal" or "first part" discussed below may also be referred to as "second component", "second component", "Second switch", "second signal" or "second part" without departing from the teaching of this article.

The detailed technical features of the light-emitting module, the driving chip, and the driving method proposed by the present invention will be described below with several embodiments, respectively.

FIG. 1 is a schematic diagram of a light emitting module in the first embodiment of the present invention. Please refer to FIG. 1, for example, the light-emitting module 100 is applied as a backlight module, which is used as a light source of a display device. The light emitting module 100 includes a substrate 110, a light emitting unit 120, and a driving chip 130, wherein the light emitting unit 120 is The driving chip 130 is disposed on the substrate 110, and the driving chip 130 is electrically connected to the light emitting unit 120.

Specifically, the substrate 110 of this embodiment is made of glass, for example, the light emitting unit 120 including the mini LED 121 is disposed on the substrate 110, and the driving chip 130 is also disposed on the substrate 110 by Chip on Glass (COG). With the mini LED 121 with high luminous efficiency, the driving chip 130 can drive the mini LED 121 with a lower current. At the same time, because the current demand of the driving signal provided by the driving chip 130 is reduced, the driving chip 130 can be connected to the substrate 110 in a COG manner without affecting the overall signal transmission and optical effect. The present invention is not limited to the above-mentioned sub-millimeter light-emitting diodes. In other embodiments, it may be a micro light-emitting diode (micro LED) or other light-emitting diodes with high luminous efficiency.

The driving chip 130 of the first embodiment of the present invention is, for example, an integration chip (i-Chip), which includes a timing controller unit and a data control unit, and is arranged in a COG manner in On the substrate 110, the arrangement of the elements 112 outside the substrate 110, for example, on a flexible printed circuit board (FPC) 111 can be reduced, thereby further reducing the area of the printed circuit board 111. On the other hand, the driving chip 130 proposed by the present invention is not limited to the above-mentioned process method in which COG is provided on a glass substrate. In other embodiments, it may be formed by a Chip on Film (COF) or Tape Carrier Package (TCP) process. On a flexible printed circuit board. In other words, the driving chip proposed by the present invention can be formed on the substrate or the flexible circuit board by various processes, and can be flexible to match the mechanism design to further reduce the overall volume of the light emitting module 100.

On the other hand, the light emitting module 100 of the present invention further includes a gate drive circuit 101, preferably a Gate on array (GOA) gate drive circuit 101 fabricated on the glass substrate 110, for The signal is provided to enable the switches in these light emitting units 120, but the invention is not limited thereto. In other embodiments, the light emitting module can be driven by the driving chip proposed by the present invention without a gate driving circuit, which will be described in detail in other embodiments. The following first describes the driving in the first embodiment of the present invention Detailed technical features of the chip 130 and the light emitting module 100. Meanwhile, the driving chip 130 of this embodiment can operate in an active driving mode and a passive driving mode. The first embodiment below will first describe the detailed technical features of the light emitting module 100 and the driving chip 130 in the active driving mode.

Active drive mode

FIG. 2 is a functional block diagram and circuit diagram of the display module in the first embodiment of the present invention. Referring to FIG. 2, the driving chip 130 of the light emitting module 100 of this embodiment includes a control unit 131, a first switch T1 and a second switch T2. Specifically, the driving chip 130 of this embodiment has multiple sets of first switches T1 and second switches T2 corresponding to the multiple light emitting units 120.

In this embodiment, the active driving mode is taken as an example. In the active driving mode, the driving chip 130 is suitable for driving light-emitting units each having a pixel circuit, preferably a pixel formed by a thin-film transistor (Thin-Film Transistor, TFT). The circuit is, for example, a light-emitting unit that drives a high-efficiency light-emitting diode, an organic light-emitting diode, a sub-millimeter light-emitting diode, or a micro-light-emitting diode with 2T1C.

Specifically, the light-emitting unit 120 of this embodiment includes a first light-emitting switch T11 and a second light-emitting switch T12 corresponding to each sub-millimeter light-emitting diode 121, wherein the first light-emitting switch T11, the second light-emitting switch T12, and the capacitor Cs are formed 2T1C pixel circuit to drive sub-millimeter light-emitting diode 121. When the first light-emitting switch T11 is enabled, it can transmit a signal to the gate of the second light-emitting switch T12. The second light-emitting switch T12 is enabled after receiving the signal from the gate, so that the sub-millimeter light-emitting diode 121 can be connected to the power line Vdd And Vss receive drive signals.

In the active driving mode, the driving chip 130 of this embodiment can provide a data signal Data to the light-emitting unit 120 on the substrate 110, and can further provide a clock control signal Timing ctrl to enable the gate driving circuit 101 to form the first scan signal Scan1来 Providing to the light emitting unit 120. In detail, in this embodiment, the driving chip 130 provides the data signal Data to the light emitting unit 120 via the control unit 131, and also provides the clock control signal Timing ctrl to the gate driving circuit 101 via the control unit 131. After receiving the clock control signal Timing ctrl, the gate driving circuit 101 can output the first scan signal Scan1 to the first light-emitting switch T11 of the light-emitting unit 120, and the first light-emitting switch T11 can transmit the data signal from the control unit 131 after being enabled Data. After the data signal Data is transmitted to the gate of the second light-emitting switch T12, the second light-emitting switch is enabled, so that the sub-millimeter light-emitting diode 121 can receive the first driving signal from the power lines Vdd and Vss, and the driving current ILED flows through the sub-millimeter The light emitting diode 121 emits light. Therefore, the driving chip 130 of this embodiment can drive the light-emitting unit 120 having a 2T1C pixel circuit, and at the same time, it can be arranged on the above-mentioned substrate 110 with COG.

Since the driving chip 130 proposed by the present invention is, for example, an integrated chip, and the driving chip 130 can provide a clock control signal to the GOA gate driving circuit 101 while providing a data signal, which reduces the volume of the FPC 110 and can also be formed Narrow bezel display device. When the light emitting module 100 of the present embodiment is formed as a display device, the active area (Active Area) may occupy a higher ratio.

On the other hand, the driving chip 130 proposed by the present invention provides signals to drive the light emitting unit 120 in other ways when the internal switch does not operate normally. Specifically, the driving chip 130 includes a plurality of buffers 132, a plurality of third switches T3, and a plurality of sixth switches T6, wherein each buffer 132, the third switch T3, and the sixth switch T6 are respectively connected to a light emitting Unit 120.

In the control unit 131, the data signal is transferred to the non-inverting terminal of the buffer 132. The buffer 132 of this embodiment is formed by an amplifier, for example, and the sixth switch T6 is connected to the output terminal and the inverting terminal of the buffer 132. When the sixth switch T6 is enabled, the amplifier is formed as an operational amplifier suitable as a buffer amplifier, so that the input voltage obtained from the non-inverting input terminal is the same as the output voltage, and the output data signal has a greater driving capability .

The third switch T3 of this embodiment is connected between the output terminal of the buffer 132 and the light emitting unit 120. In the active driving mode, the third switch T3 is enabled, and the data signal from the buffer 132 can be transmitted to the light emitting unit 120 through the turned-on third switch T3. In other words, in the active mode, the driving chip 130 of this embodiment can be used as a data driving circuit to provide a data signal to the light emitting unit 120.

On the other hand, referring to FIG. 2, the driving chip 130 of this embodiment further includes a timing control circuit 133. The control unit 131 is connected to the timing control circuit 133 and receives the timing signal from the timing control circuit 133. The control unit 131 further includes a shift register 134 (Shift Register), a line latch 135 (Line Latch), an electrical shifter 136 (Level Shifter), and a digital/analog converter 137 (DAC). Under the control of the clock signal and the shift register 134, the line latch 135 is sequentially opened to store the data signal including the digitized video data. The electric displacement converter 136 boosts the voltage, and then converts it to an analog signal suitable for driving the light emitting unit 120 by the DAC 137. At the same time, the control unit 131 of the present embodiment provides a clock control signal Timing ctrl to the gate driving circuit 101, so that the gate driving circuit 101 can correspondingly provide the scanning signal Scan1 to the first light-emitting switch T11 in the light-emitting element 120.

In other words, the driving chip 130 of this embodiment can provide timing control (Timing control) and data driving (Data driving) functions, at the same time can also be used with GOA gate drive circuit 101 to provide scanning signals. The driving chip 130 formed as an integrated chip can reduce the volume of the above FPC, and the gate driving circuit 101 can further reduce the thickness of the surrounding frame, that is, the backlight module or the display module formed by the light emitting module 100 of this embodiment The group can be formed as a good thin-frame display.

On the other hand, the driving chip 130 proposed by the present invention can also use different circuits to transmit signals to repair the light-emitting function of the light-emitting element when the internal elements are not operating normally. 3 is a schematic circuit diagram of the light emitting module of the first embodiment of the present invention when repairing a signal. For example, referring to FIG. 3, when the third switch T3 does not operate normally, the driving chip 130 of this embodiment will turn off the third switch T3 and the sixth switch T6, and simultaneously enable the fourth switch T4 and the fifth switch T5. The fourth switch T4 is connected between the output terminal of the buffer 132 and the gate of the second switch T2, so the signal output by the buffer 132 is provided to the gate of the second switch T2. At this time, one end of the light emitting unit 120 originally used to receive the data signal Data is connected to one side of the second switch T2, and the fifth switch T5 is connected between the other side of the second switch T2 and the inverting input end of the buffer 132.

After the fourth switch T4 and the fifth switch T5 are turned on, the pulse width modulation (PWM) switch PWM SW starts to encode the signal to the light emitting unit 120. For example, when the pulse width modulation switch PWN SW is open, the signal provided to the gate of the second switch T2 through the fourth switch T4 can be increased by the parasitic capacitance of the second switch T2 (that is, connected to the light The voltage at one end of unit 120 shall prevail. The signal transmitted by the fourth switch T4 charges the circuit connected to the light-emitting unit 120, and the pulse-width modulation switch PWN SW allows the light-emitting unit 120 to receive a high-potential signal when the circuit is disconnected. When the pulse width modulation switch PWM SW is turned on, the voltage level of the line turned on by the second switch T2 will be turned on via the pulse width modulation Turn off the PWN SW to ground, so that the voltage level assumes a low potential. The driving chip 130 of this embodiment converts the original data signal Data into a pulse wave, that is, digitally encodes the analog signal, and then forms these pulse waves by the pulse width modulation switch PWM SW switch, and uses these pulses Wave to drive the light-emitting unit 120 to restore the light-emitting unit 120 can still provide an appropriate optical effect when the third switch T3 does not operate normally.

4 is a schematic diagram of signals of the light emitting module according to the first embodiment of the present invention, in which Gate(n-1), Gate(n), Gate(n+1) are scanning signals sequentially transmitted to the light emitting units on a data line ; Vch is the signal at the contact point of the driving chip 130 connected to the light emitting unit 120, and the dotted line is the ideal signal, the solid line is the actual signal, wherein the vertical axis of the signal is, for example, volts, and the horizontal axis is the unit of time, for example, millisecond (millisecond) , ms). ILED is the driving current in the light emitting unit 120, and the dashed line is the ideal signal, the solid line is the actual signal, wherein the vertical axis unit is milliamp (mA), and the horizontal axis unit is time, for example millisecond (ms) . The following description will be made with reference to the above element numbers.

Referring to FIG. 4, before the time point t1, the actual signal of the signal Vch is unstable due to the abnormal operation of the third switch T3, which is different from the ideal signal. At this time, the driving chip 130 starts to switch from the active driving mode shown in FIG. 2 to the correction mode shown in FIG. 3, and a pulse signal is formed after the time point t1 by the pulse width modulation switch PWM SW, that is, in the signal Vch The ideal signal (the dotted line part) is converted into a pulse signal by the pulse width, and the duty ratio of the pulse signal is adjusted so that the sub-millimeter light-emitting diode 121 can be lit in the same manner. It can be seen from the signal ILED that after the time point t1, the current driving the sub-millimeter light-emitting diode 120 in the period between t2 and t3 and between t6 and t7 is close to the ideal signal; in the period between t4 and t5 The current driving the sub-millimeter light-emitting diode 120 is driven in a short time to provide a light-emitting effect close to the actual signal.

As can be seen from the above, through the conduction of the fourth switch T4 and the fifth switch T5, and the control of the pulse width modulation PWM SW, even when the third switch T3 fails to operate, the driving chip 130 can still normally drive the light emitting element 120 to provide Appropriate optical effects.

The driving chip 130 proposed by the present invention can also automatically monitor the signals in the active driving mode, and at the same time, can switch between these modes by controlling these switches. Specifically, referring to FIG. 3, the driving chip 130 of this embodiment further includes a protection unit 140, and the protection unit 140 is connected to one end of the output signal of the third switch T3, the non-inverting input end of the buffer 132, and the buffer 132 The inverting input terminal and the timing control circuit 133.

In the active driving mode, the protection unit 140 of this embodiment compares the voltage of the output terminal of the third switch T3 (that is, the voltage of the contact of the driving chip 130 to output the data signal) with the voltage of the non-inverting input terminal of the buffer 132 To determine whether the third switch is not operating normally. FIG. 5 is a partial flow diagram of the driving method for driving the wafer 130 in the first embodiment of the present invention. Referring to FIG. 5, the driving chip 130 first detects the output voltage Vch of the third switch T3 and the input voltage V+ of the buffer 132 (step S11 ), and obtains these voltage information through the protection unit 140. The protection unit 140 compares whether the voltage Vch is the same as the voltage V+ (step S12). When the two voltage values are the same, the third switch T3 is judged to be in normal operation and continues to obtain the new voltage information to continue to the third switch T3. Monitor (return to step S11).

When the two voltage values are different, the driving chip 130 determines that the third switch T3 is not operating normally. At this time, the driving wafer 130 turns off the third switch T3 and the sixth switch T6, and turns on the fourth switch T4 and the fifth switch T5 (step S13). Through the above-mentioned switch, the source and the drain of the second switch T2 are substantially in a floating state (floating state), so a parasitic capacitance can be formed between the gate and the drain of the second switch T2. At this time, by controlling the pulse width modulation switch PWM SW can be driven The contact point of the movable chip 130 connected to the light-emitting unit 120 emits a pulse wave (step S14), and then the original data signal is pulse-wave-modulated to form a pulse wave to be provided to the light-emitting unit 120 for the sub-millimeter light-emitting diode 121 to provide Substantially the same luminous effect.

On the other hand, the driving chip 130 of this embodiment can also provide error information to let the user know. Please refer to FIG. 4 together. The driving chip 130 of this embodiment also transmits an error signal Fault. In this embodiment, the driving chip 130 determines that the third switch T3 is not operating normally at time t1 and switches to the above-mentioned correction mode, and also outputs an error signal Fault to inform the user through, for example, a connected computer host .

Please refer to FIG. 5 again. As mentioned above, when the driving method of this embodiment is switched to adjust the signal with the pulse width modulation switch PWN SW, then the fault signal Fault is output (step S15) to inform the user.

6A and 6B are schematic diagrams of the light-emitting surface formed by the light-emitting module according to the first embodiment of the present invention. Referring to FIG. 6A, the light-emitting surface 122 formed by the light-emitting unit 120 of the present embodiment is suitable for arrangement and is formed as a surface light source. When a third switch T3 in the driving chip 130 of this embodiment does not operate normally, a data line that cannot transmit data signals will make the brightness of the light emitting array 122r1 connected to this data line lower than the brightness of the light emitting array 122r2 connected to other data lines . With the above driving method, that is, the connection of the fourth switch T4 and the fifth switch T5 and the control of the pulse width modulation switch PWM SW, the light-emitting unit 120 that could not receive the data signal from the third switch T3 can borrow The pulse wave controlled by the pulse width modulation switch PWM SW is turned on to achieve the correction effect shown in FIG. 6B, even if the brightness of the light emitting array 122r1 is similar to the brightness of the light emitting array 122r2.

As can be seen from the above, the light emitting module 100 provided by the embodiment of the present invention can be The driving chip 130 lights up the light-emitting diode, sub-millimeter light-emitting diode, and micro-light-emitting diode driven by the 2T1C pixel circuit. At the same time, when the switch that transmits the data signal does not operate normally, the light emitting module 100 provided by the embodiment of the present invention can be corrected by the driving chip 130 to reduce the influence caused by the switch that does not operate normally.

Passive drive mode

FIG. 7 is a schematic diagram of a light emitting module in a second embodiment of the present invention. The passive driving mode of the embodiment of the present invention is described below with the light emitting module 200. Since the driving chip and driving mode proposed by the present invention can be driven in an active driving mode and a passive driving mode, some components are substantially similar to the above-mentioned light emitting module 100 and driving chip 130, and some switches in FIG. 7 are labeled with the same reference numerals. The description is used to clearly explain the detailed technical features in this embodiment, and it is not intended to limit the present invention.

Please refer to FIG. 7. As mentioned earlier, the driving chip provided by the present invention can directly provide driving signals to light up sub-millimeter light-emitting diodes, micro-light-emitting diodes, or other high-efficiency light-emitting diodes.

In the second embodiment of the present invention, the light emitting module 200 includes a substrate 210 and a plurality of light emitting units 220 formed on the substrate 210. The light emitting module 200 further includes driving chips 230A and 230B, and these driving chips 230A and 230B are formed on the substrate 210 by COG, so the area of the flexible printed circuit board 211A and the components 212A and the flexible type can be saved The area of the printed circuit board 211B and the components 212B thereon.

In the passive driving mode, both the vertical circuit and the horizontal circuit of this embodiment are provided by the driving chip 230A or 230B, so the driving signal can be provided to the light emitting unit 220 by connecting two driving chips 230A and 230B in parallel. Specifically, the driving chip 230A of this embodiment can drive the sub-millimeter light emitting diode 221A on the left side of the substrate 210; the driving chip 230B can drive The sub-millimeter light emitting diode 221B on the right side on the substrate 210. In other words, the driving chips 230A and 230B proposed in the embodiments of the present invention can be arranged on the substrate 210 in parallel, so as to drive the light-emitting unit 220 by division of labor. At the same time, the heat energy generated when transmitting signals will also be dispersed to improve the heat dissipation effect. The above embodiment uses two driving chips as an example, but the present invention is not limited to this. In other embodiments of the present invention, these light emitting units may be driven by a single or multiple driving chips in a passive driving mode.

8 is a schematic diagram of functional blocks and circuits of a display module in a second embodiment of the invention. Referring to FIG. 8, the driving chip 230A of the light emitting module 200 of this embodiment includes a control unit 231, a first switch T1 and a second switch T2. Specifically, the driving chip 230A of this embodiment corresponds to a plurality of light emitting units 220 having a plurality of sets of first switches T1 and second switches T2, and each of the light emitting units 220 has at least one millimeter light emitting diode 221, each light emitting unit 220 corresponds to one of the first switch T1 and the second switch T2.

In the passive driving mode, the driving chip 230A of this embodiment is suitable for driving light-emitting units whose respective light-emitting diode contacts are directly connected to scan lines (row scan lines) and data lines (column scan lines). The body is, for example, a light-emitting diode having high luminous efficiency, an organic light-emitting diode, a sub-millimeter light-emitting diode, or a micro-light-emitting diode.

Specifically, the driving chip 230A of this embodiment includes a first switch T1 and a second switch T2 corresponding to each sub-millimeter light-emitting diode 221, wherein the first switch T1 is connected to the light source power supply VLED, and the second switch T2 passes the pulse width The modulation switch PWM SW may be connected to the ground electrode. The control chip 231 can send a second scan signal Scan2 to enable the first switch T1; send a third scan signal Scan3 to enable the second switch T2, so that the sub-millimeter light-emitting diode 221 can receive the driving signal from the light source power VLED.

In the passive driving mode, the driving chip 230A of this embodiment can provide the second scanning signal Scan2 and the third scanning signal Scan3 to enable the light emitting unit 220 to receive the driving signal, and the first switch T1 enabled by the second scanning signal Scan2 For example, a signal line (column scan line) is provided to the light emitting unit 220; a second switch T2 enabled by the third scan signal Scan3 provides a scan line (row scan line) to the light emitting unit 220, for example. When the light-emitting units 220 of this embodiment are provided with signals by n column scanning lines and m row scanning lines, the driving chip 230A will correspond to the n column scanning lines respectively connected by n first switches T1, and by The m second switches T2 are respectively connected to the m row scanning lines. The control unit 231 of the driving chip 230A provides the second scan signal Scan2 to enable the first switch T1 to enable the column scan line connected to one of the light emitting units 220 to transmit the signal, and also selectively provides the third scan signal Scan3 to enable the second The switch T2 turns on the row scan line connected to the light-emitting unit 220, so that the driving current ILED can cause the sub-millimeter light-emitting diode 221 to emit light. Therefore, the driving chip 230 of this embodiment can drive the light emitting unit 220, and at the same time, it can be arranged on the substrate 210 with COG.

Since the driving chip 230A proposed by the present invention is, for example, an integrated chip, in addition to reducing the volume of the FPCs 211A and 211B, a narrow-frame display device can also be formed. When the light emitting module 200 of this embodiment is formed as a display device, the active area (Active Area) may occupy a higher ratio.

On the other hand, the driving chip 230A of the present invention provides signals to drive the light-emitting unit 220 in other ways when the internal switch or the light-emitting unit does not operate normally. Specifically, the driving chip 230A includes a plurality of buffers 232, a plurality of fourth switches T4, and a plurality of fifth switches T5, wherein each row scan line corresponds to one of the buffer 232, the fourth switch T4, and the second switch T2 and the fifth switch T5.

In the control unit 231, the third scan signal Scan3 is output from the buffer 232. The fourth switch T4 of this embodiment is connected between the output terminal of the buffer 232 and the gate of the second switch T2. In the passive driving mode, the fourth switch T4 is enabled, and the third scan signal Scan3 from the buffer 232 can enable the second switch T2 through the turned-on fourth switch T4.

On the other hand, referring to FIG. 8, the driving chip 230A of this embodiment further includes a timing control circuit 233. The control unit 231 is connected to the timing control circuit 233 and receives timing signals from the timing control circuit 233. The control unit 231 further includes a shift register 234 (Shift Register), a line latch 235 (Line Latch), an electrical shifter 236 (Level Shifter), and a digital/analog converter 237 (DAC). Under the control of the clock signal and the shift register 234, the line latch 235 is sequentially opened to store the scan signal including the digitized video data. The electrical shifter 236 boosts the voltage, and the second scan signal Scan2 is then transmitted to the first switch T1, and then the third scan signal Scan3 is transmitted to the second switch T2 through the DAC 237, so that the corresponding light emitting unit 220 receives the driving signal . At this time, since the pulse width modulation switch PWM SW of the driving chip 230 is connected to the output end of the second switch T2, the width of the pulse VLED pulse driving the light emitting unit 220 can be controlled by controlling the pulse width modulation switch PWM SW, thereby enabling The light emitted by the sub-millimeter light emitting diode 221 may have different brightness effects.

In other words, the driving chip 230A of this embodiment can provide the functions of timing control (Timing control) and scan driving (Scan driving). The driving chip 230A formed as an integrated chip can reduce the volume of the FPC and further reduce the thickness of the frame, that is, the backlight module or the display module formed by the light emitting module 200 of this embodiment can be formed as a good thin frame display .

On the other hand, the driving chip 230 proposed by the present invention can also When the device does not operate normally, different circuits transmit signals to repair the light-emitting function of the light-emitting unit.

Detect that the second switch is not working properly

Referring to FIG. 8, the driving chip 230A further includes a protection unit 240 that can detect the voltage of the inverting input terminal and the voltage of the non-inverting input terminal of the buffer 232. When the two voltage values are different from each other, the protection unit 240 can determine The second switch T2 does not operate normally.

9 is a schematic circuit diagram of a light emitting module according to a second embodiment of the present invention when repairing a signal. In detail, please refer to FIG. 9, when the protection unit 240 determines that the second switch T2 is not operating normally, the driving chip 230A of this embodiment will turn off the fourth switch T4, the fifth switch T5 and the pulse width modulation switch PWM SW . The driving chip 230A of this embodiment is substantially paralleled with a plurality of second switches T2 to drive a plurality of light emitting units 220 in a region. Therefore, after the above-mentioned switch is turned off, the driving chip 230A raises other adjacent second switches (here, taking the second switch T2-0 as an example, it may be possible to simultaneously lift multiple adjacent second switches, the invention is not limited to This) current ILED-0, to ensure the brightness of the sub-millimeter light-emitting diode 221.

10A and 10B are schematic diagrams of the light-emitting surface formed by the light-emitting module of the second embodiment of the present invention. Referring to FIG. 10A, the light-emitting surface 222 formed by the light-emitting unit 220 of the present embodiment is suitable for arrangement and is formed as a surface light source. When a second switch T2 in the driving chip 230 of this embodiment does not operate normally, the brightness of the light emitting array 222r1 receiving the driving signal through the second switch T2 is lower than that of the other light emitting arrays 222r2. By the above driving method, that is, the fourth switch T4, the fifth switch T5 and the pulse width modulation switch PWM SW corresponding to the abnormally operating second switch T2 are turned off, and the circulation of the adjacent second switch is increased In order to achieve the correction effect shown in FIG. 10B, the brightness of the light emitting array 222r1 and the brightness of the light emitting array 222r2 are similar.

FIG. 11 is a schematic flowchart of detecting and repairing the second switch in the second embodiment of the present invention. Referring to FIG. 11, the method of driving the light emitting module 200 as described above, the light emitting module 200 of this embodiment first uses a plurality of second switches T2 and T2-0 to drive a plurality of light emitting units in parallel (step S21), here The plurality of light-emitting units are, for example, a row, a column, or a block, and the invention is not limited thereto. During the driving, the protection unit 240 detects the voltage VFB of the inverting input terminal of the buffer 232 and the voltage V+ of the non-inverting input terminal (step S22), and then compares whether the two are different (step S23). When the two are the same, it is determined that the second switch T2 is operating normally, and then the voltage VFB of the inverting input terminal and the voltage V+ of the non-inverting input terminal are continuously detected (return to step S22).

If the voltage VFB at the inverting input terminal is different from the voltage V+ at the non-inverting input terminal, it is determined that the second switch T2 is not operating normally. At this time, the driving chip 230A turns off the corresponding fourth switch T4, fifth switch T5 and the pulse width adjustment. The switch PWM SW is changed (step S24). Next, the driving chip 230A distributes the current originally flowing through the abnormally operating second switch T2 to the adjacent second switch (step S25), that is, the second switch T2 connected in parallel to the same light emitting unit 220 to compensate To normal brightness.

As described above, the driving unit provided by the embodiment of the present invention can also send out an error signal. The driving chip 230A of the second embodiment of the present invention may also send an error signal (step S26) to the user after completing the correction step.

Detect short circuit or open circuit of light emitting unit

In the passive driving mode, the driving chip 230A of this embodiment can also detect whether the light emitting unit 220 has a short circuit or an open circuit. FIG. 12 is a schematic circuit diagram of the light emitting module of the second embodiment of the present invention when repairing the signal of the light emitting unit. Referring to FIG. 12, the protection unit 240 can determine whether the light-emitting unit 220 is short-circuited or broken by detecting the voltage value Vch of the contact of the light-emitting unit 220. For example, this The protection unit 240 of the embodiment may preset a short-circuit voltage threshold Vshort-th, and determine whether the light-emitting unit 220 is short-circuited by determining whether the voltage value Vch exceeds the short-circuit voltage threshold Vshort-th.

Referring to FIG. 12, when the driving voltage of the light-emitting unit 220 exceeds the short-circuit voltage threshold Vshort-th, the protection unit 240 turns off the pulse width modulation switches PWM SW and PWM SW-0 at the time of driving the corresponding light-emitting unit, so that The current path of the normally operating light emitting unit 220 is disconnected, thereby preventing the driving chip 230A from being damaged due to excessive current.

13 is a signal schematic diagram of the light emitting module of the second embodiment of the present invention when repairing the signal of the short circuit light emitting unit. Referring to FIG. 13, VLEDn-1, VLEDn, and VLEDn+1 are drive power signals corresponding to different scanning lines, ILED is the current value at one end of the driving chip 230 outputting the light emitting unit 220; Vch is the driving chip 230 outputting the light emitting unit 220 The voltage value at one end. In the time interval between time points t0 and t1, the current ILED and the voltage Vch increase due to the short circuit of the light-emitting unit 220, so that the signal protection unit 140 can determine that the light-emitting unit 220 is short-circuited.

The driving chip 230A of this embodiment can also determine the short-circuit condition of the light-emitting unit 220 multiple times, that is, it can be confirmed once again whether the voltage provided to the same light-emitting unit 220 next time still exceeds the short-circuit voltage threshold Vshort-th. Referring to FIG. 13, in the time interval between time points t2 and t3, the voltage Vch still exceeds the normal value. At this time, the protection unit 240 confirms that the light-emitting unit 220 is short-circuited, and then provides a signal to the light-emitting unit 220 each time Open the pulse width modulation switch PWM SW. Therefore, in the time interval between time points t4 and t5 and the time interval between time points t6 and t7, the voltage Vch and the current ILED both fall to zero, thereby protecting the driving chip 230.

14 is a schematic flow chart of detecting and repairing a short-circuit light-emitting unit in a second embodiment of the present invention. Please refer to FIG. 14. As described above, the protection unit 240 of the second embodiment of the present invention is first The driving voltage Vch of the light emitting unit 220 is detected (step S31), and it is determined whether the light emitting unit 220 is short-circuited by comparing with the short-circuit voltage threshold Vshort-th (step S32). When the voltage Vch is less than the short-circuit voltage threshold Vshort-th, the light-emitting unit 220 is operating normally, and the protection unit 240 detects Vch again to continue the detection (return to step S31).

When the voltage Vch is greater than the short-circuit voltage threshold Vshort-th, the light-emitting unit 220 is short-circuited. At this time, the protection unit 240 turns off the pulse width modulation switch when driving the light-emitting unit 220 (step S33). The judgment of the above short circuit may be repeated two or more times to confirm that the light emitting unit 220 is a short circuit, and the present invention is not limited to this number of judgments.

After the pulse width modulation switch corresponding to the light-emitting unit 220 is turned off, the protection unit 240 can output a signal to improve the drive circuit of other light-emitting units around the light-emitting unit 220. Obvious dark spots appear on the luminous surface or display screen.

On the other hand, as described above, the protection unit 240 may output an error signal (step S35) to inform the user after performing the above-mentioned repair steps, that is, the Fault signal in FIG. 13.

The driving wafer 230A of this embodiment can also determine the disconnection of the light emitting unit 220. 15 is a signal diagram of a light emitting module in repairing a broken light emitting unit in a second embodiment of the present invention. Referring to FIG. 15, in this embodiment, when the driving voltage Vch of the light emitting unit 220 is less than a cut-off voltage threshold Vopen-th, that is, the interval between the time point t0 to t1 and between the time point t2 to t3 In the interval, the protection unit 240 can determine that the light emitting unit 220 is an open circuit. At this time, the protection unit 240 also turns off the pulse width modulation switch corresponding to the driving time, so as to avoid the current malfunction and damage the driving chip 230.

16 is a flow of detecting and repairing a broken light emitting unit in the second embodiment of the present invention Schematic diagram. Referring to FIG. 16, as described above, the protection unit 240 of the second embodiment of the present invention first detects the driving voltage Vch of the light emitting unit 220 (step S41), and determines the light emitting unit 220 by comparing with the open circuit voltage threshold Vopen-th Whether it is broken (step S42). When the voltage Vch is greater than the short-circuit voltage threshold Vopen-th, the light-emitting unit 220 is operating normally, and the protection unit 240 detects Vch again to continuously detect (return to step S41).

When the voltage Vch is less than the cut-off voltage threshold Vopen-th, the light-emitting unit 220 is open, and the protection unit 240 turns off the pulse width modulation switch when driving the light-emitting unit 220 (step S43). The judgment of the above short circuit may be repeated twice or multiple times to confirm that the light emitting unit 220 is broken, and the present invention is not limited to this number of judgments.

After the pulse width modulation switch corresponding to the light-emitting unit 220 is turned off, the protection unit 240 can output a signal to improve the drive circuit of other light-emitting units around the light-emitting unit 220. Obvious dark spots appear on the luminous surface or display screen.

On the other hand, as described above, the protection unit 240 may output an error signal (step S45) to inform the user after performing the above-mentioned repair steps, that is, the Fault signal in FIG. 15.

The protection unit for driving the wafer in the above embodiment will be further described below, and the reference numeral of the second embodiment will be taken as an example below. 17 is a schematic diagram of a protection unit in a second embodiment of the invention. Referring to FIG. 17, the protection unit 240 connected to the timing control circuit 233 includes multiplexers 241, 242, and 243. Since the driving chip 230A can output signals to the multiple light-emitting units 220 through multiple connection terminals, the output voltage Vch1-Vchz of each light-emitting unit 220 can be determined one by one by the multiplexer 241, and whether it is greater than the short circuit by the amplifier 244 Voltage threshold Vshort-th; judge by amplifier 245 whether it is less than the open circuit voltage threshold Vopen-th, and output the judgment result to the logic sheet Yuan 247. The logic unit 247 outputs the pulse width modulation control signal PWM SW Ctrl which can control the pulse width modulation switch PWM SW according to the judgment result, or the output can control the third switch T3, the fourth switch T4, the fifth switch T5 or the sixth switch T6 control signal.

Multiplexers 242 and 243 can detect the non-inverting input voltage V+1-V+z and the inverting input voltage VFB1-VFBz of each buffer one by one. The comparator 246 determines whether the two voltages are equal, and outputs a command for the third switch to operate abnormally in the active driving mode, and outputs a command for the second switch to operate abnormally in the passive driving mode. The logic unit 247 receives these commands and then sends out an error signal, or correspondingly controls the pulse width modulation switch, the third switch, the fourth switch, the fifth switch, and the sixth switch by the driving method in the above embodiment.

On the other hand, since the light-emitting units in the light-emitting module of the above embodiments of the present invention all include sub-millimeter light-emitting diodes, in other embodiments, they may be micro-light-emitting diodes. With a small volume of sub-millimeter light-emitting diodes, the distribution of light-emitting units can be more dense, and a diffuser plate with higher transmittance can be used, so the brightness requirements of each light-emitting unit can also be reduced.

Specifically, FIG. 18 is a cross-sectional view of a backlight module of a conventional light-emitting diode and a cross-sectional view of a light-emitting module according to an embodiment of the present invention. Referring to FIG. 18, since the conventional light-emitting diode 51 has a larger volume, the overall thickness D1 needs to be thicker to form a uniform light distribution before the diffuser 50 with high transmittance can be used. However, in order to achieve the desired brightness at this thickness, the driving current of the light-emitting diode 51 also needs to be increased.

If the distance between the conventional light-emitting diodes 53 is increased, the conventional light-emitting diodes 53 will also be equipped with a diffuser plate 52 with a high thickness and a low transmittance to ensure that light can be emitted in a uniform light pattern. However, because the diffusion plate 52 with low transmittance is applied, although the thickness D1 of the backlight module is the same, it is more necessary to increase the driving current to light the light-emitting diode 53 to achieve the desired brightness.

In contrast, the light-emitting module of the embodiment of the present invention is formed by, for example, a sub-millimeter light-emitting diode 302. Because of the higher distribution density, the overall thickness D2 can be reduced, and the high-density distribution can be matched with Diffusion plate 301. At the same time, the driving current of the sub-millimeter light-emitting diode 302 is also lower than that of the light-emitting diode, so that the driving chip can be formed on the substrate in a COG manner.

In summary, the driving wafer of the present invention can be formed on the substrate in a COG manner to reduce the size of the FPC. The driving chip and the driving method of the present invention can also drive the light-emitting unit in an active drive mode and a passive drive mode, and at the same time, it can detect whether the internal components are damaged and repair it so that the light-emitting unit can provide the same optical effect. The light-emitting module of the present invention includes the above-mentioned driving chip, which can reduce the overall volume, and at the same time can detect whether the component is not functioning normally and repair it.

Cs‧‧‧Capacitance

Data‧‧‧Data signal

ILED‧‧‧Drive current

Scan1‧‧‧Scan signal

T1~T6, T11, T12, PWM SW‧‧‧ switch

Timing ctrl‧‧‧clock control signal

Vdd, Vss‧‧‧Power cord

100‧‧‧Lighting module

101‧‧‧ gate drive circuit

110‧‧‧ substrate

120‧‧‧Lighting unit

121‧‧‧mm LED

130‧‧‧Drive chip

131‧‧‧Control unit

132‧‧‧Buffer

133‧‧‧sequence control circuit

134‧‧‧Shift register

135‧‧‧Line latch

136‧‧‧Electric displacement converter

137‧‧‧Digital/Analog Converter

Claims (18)

A light emitting module includes: a substrate; a driving chip is arranged on the substrate; at least one light emitting unit is arranged on the substrate and connected to the driving chip; and a flexible printed circuit board is electrically connected to the light emitting unit, the driving The chip is arranged on the substrate in a COG manner, or on the flexible printed circuit board in a COF or TCP manner; wherein the driving chip provides a data signal to enable the light emitting unit to obtain a first driving signal, or to provide a first Two driving signals are given to the light-emitting unit. The light-emitting unit includes a micro-light emitting diode or a sub-millimeter light emitting diode. The light-emitting module according to item 1 of the patent application scope, wherein the driving chip can provide signals to the light-emitting unit in an active driving mode and a passive driving mode, the driving chip includes a control unit, and corresponds to each of the The light-emitting unit has a first switch and a second switch; when the driving chip is in the active driving mode, and the light-emitting unit each includes a first light-emitting switch and a second light-emitting switch connected to the micro-light emitting diode or the sub-light In the case of millimeter light-emitting diodes, the driver chip provides the data signal and a clock control signal from the control unit, the clock control signal is suitable for a gate drive circuit to provide a first scanning signal to enable the first light-emitting switch , The data signal is suitable for enabling the second light-emitting switch, so that the light-emitting unit can receive the first driving signal from a power line through the second light-emitting switch; when the driving chip is in the passive driving mode, and the The first switch receives the second driving signal from a light source power source, the driving chip provides a second scanning signal from the control unit to enable the first switch, and provides a third scanning signal to enable the second switch to enable Connected to the first open The light-emitting element between the off and the second switch receives the second driving signal. According to the light-emitting module described in Item 2 of the patent application scope, the control unit corresponding to each light-emitting unit further includes: a buffer for outputting the data signal or the third scanning signal; and a sixth switch connected to Between the output end of the buffer and the inverting input end, and is turned on in the active driving mode; the driving chip corresponding to each light-emitting unit further includes: a third switch, turned on in the active driving mode and connected to Between the first light-emitting switch and the output end of the buffer of the control unit, for transmitting the data signal; a fourth switch, which is opened in the passive driving mode and connected to the gate of the second switch and the buffer Between the output terminals of the device, for transmitting the third scanning signal; a fifth switch, which is turned on in the passive driving mode and connected to the end of the second switch outputting the second driving signal and the inverse of the buffer Between the input terminals; a pulse width modulation switch, in the passive driving mode, encodes the second driving signal and connects between one end of the second switch outputting the second driving signal and the ground electrode. The light emitting module according to item 3 of the patent application scope, wherein the driving chip further comprises: a protection unit connected to the buffer and receiving an input signal or an output signal of the buffer, the protection unit is used to monitor the second A switch, the third switch, and the light-emitting unit, and control the third switch, the fourth switch, the fifth switch, the sixth switch, and the pulse width modulation switch. The light emitting module according to item 4 of the patent application scope, wherein the output end of the buffer is connected to the protection unit; The inverting input terminal and the non-inverting input terminal of the buffer are respectively connected to the protection unit. The light emitting module of claim 4 of the patent application scope, wherein when the third switch monitored by the protection unit does not normally operate in the active driving mode, the protection unit turns on the fourth switch and the fifth switch and Turn off the third switch and the sixth switch, and simultaneously activate the pulse width modulation switch to encode the signal transmitted by the second switch. The light emitting module of claim 4 of the patent application scope, wherein when the second switch monitored by the protection unit or the light emitting unit does not operate normally in the passive driving mode, the protection unit closes the pulse width modulation switch , The fourth switch and the fifth switch. The light-emitting module as described in item 7 of the patent application scope, wherein the protection unit outputs a signal to increase the current of the second drive signal of the adjacent other light-emitting unit. The light-emitting module according to item 1 of the patent application scope, wherein the light-emitting unit forms an active display pixel or a backlight light source. A driving chip suitable for being arranged on a substrate in a COG manner and driving at least one light-emitting unit, or being arranged on a flexible printed circuit board in a COF or TCP manner and driving the light-emitting unit, the light-emitting unit including Micro light emitting diode or sub-millimeter light emitting diode, the driving chip includes: a control unit; and a plurality of sets of first switches and second switches; the driving chip is used to drive in an active driving mode or a passive driving mode ; When the driving chip is in the active driving mode, and each of the light-emitting units includes a first light-emitting switch and a second light-emitting switch, the drive chip provides data signals and clock control signals from the control unit, when The pulse control signal is suitable for a gate drive circuit to provide a first scan Tracing a signal to enable the first light-emitting switch, the data signal is suitable for enabling the second light-emitting switch, so that the light-emitting unit can receive a first drive signal from a power line through the second light-emitting switch; when the drive chip In the passive driving mode, and each of the first switches receives a second driving signal from a light source, the driving chip provides a second scanning signal from the control unit to enable the first switch, and provides the third scanning A signal to enable the second switch, so that the light-emitting element connected between the first switch and the second switch receives the second driving signal. As described in claim 10, the control unit further includes: a plurality of buffers for outputting the data signal or the third scanning signal; and a plurality of sixth switches, each connected to one of the Between the output end of the buffer and the inverting input end, and is turned on during the active driving mode; the driving chip further includes: a plurality of third switches that are turned on during the active driving mode and are respectively connected to one of the light emitting units Between the first light-emitting switch and one of the output terminals of the buffer of the control unit for transmitting the data signal; a plurality of fourth switches, which are turned on during the passive driving mode and connected to one of the second switches Between the gate of one of the buffers and one of the output terminals of the buffer for transmitting the third scan signal; a plurality of fifth switches, which are turned on during the passive driving mode and connected to one of the second switches to output the second Between one end of the driving signal and one of the inverting input terminals of the buffer; a plurality of pulse width modulation switches encode one of the second driving signals and connect to one of the second switches in the passive driving mode Between one end of the second driving signal and the ground electrode. The driving chip as described in item 11 of the patent application scope further includes: a protection unit connected to the buffers and receiving input signals or output signals of the buffers, the protection unit is used to monitor the second switches, The third switches and the light-emitting units, and control the third switches, the fourth switches, the fifth switches, the sixth switches, and the pulse width modulation switch. The driving chip as described in item 12 of the patent application scope, wherein the output terminal of each buffer is connected to the protection unit; the inverting input terminal and the positive phase input terminal of each buffer are respectively connected to the protection unit . The driving chip as described in item 12 of the patent application scope, wherein when one of the third switches monitored by the protection unit does not operate normally in the active driving mode, the protection unit turns on the third switch corresponding to the third switch The four switches and the fifth switch turn off the third switch and the corresponding sixth switch, and simultaneously activate the pulse width modulation switch to encode the signal transmitted by the second switch. A driving method for driving a light-emitting module, the light-emitting module includes a substrate, at least one light-emitting unit disposed on the substrate and a driving chip disposed on the substrate with COG, and the light-emitting unit includes a micro-light emitting diode or The sub-millimeter light-emitting diode, the driving method includes: when the light-emitting unit further includes a first light-emitting switch and a second light-emitting switch connected to the micro-light-emitting diode or the sub-millimeter light-emitting diode, the driving chip An active driving mode drives the light-emitting unit and provides a data signal and a clock control signal, the clock control signal is suitable for a gate drive circuit to provide a first scan signal to enable the first light-emitting switch, the data signal Suitable for enabling the second light-emitting switch, so that the light-emitting unit can receive a first drive signal from a power line via the second light-emitting switch; and When the light-emitting unit is adapted to directly receive a second driving signal, the driving chip drives the light-emitting unit in a passive driving mode, and encodes the second driving signal with at least one pulse width modulation switch. The driving method as described in Item 15 of the patent application scope further includes: detecting whether a third switch of the driving chip transmitting the data signal in the active driving mode is not operating normally; and when the third switch is detected as being abnormal During operation, the signal is transmitted by another circuit, and the signal of the other circuit is encoded by the pulse width modulation switch to form the first driving signal. The driving method described in item 15 of the patent application scope further includes: detecting whether a second switch of the driving chip transmitting the second driving signal in the passive driving mode is not operating normally; when the second switch is detected as not During normal operation, stop transmitting the second driving signal to the light-emitting unit connected to the abnormally-operating second switch; and increase the current intensity of the second driving signal of other adjacent light-emitting units. The driving method as described in item 15 of the patent application scope further includes: detecting whether the light-emitting element driven by the driving chip in the passive driving mode is short-circuited or broken; when the light-emitting element is detected as short-circuited or broken, stop transmitting the A second driving signal; and increasing the current intensity of the second driving signals of other adjacent light emitting units.

Images