Light-emitting substrate and driving method thereof, light-emitting module, and display apparatus

A light-emitting substrate and a method of driving the same, a light-emitting module, and a display apparatus are provided. The light-emitting substrate has a plurality of light-emitting areas. The light-emitting substrate includes: a base, a plurality of light-emitting components, a plurality of first power supply voltage signal lines, and a plurality of first control circuits. The plurality of light-emitting components are disposed on the base. The plurality of first power supply voltage signal lines are disposed on the base and arranged at intervals. The plurality of first control circuits are disposed on the base. One light-emitting component is located in one light-emitting area. Each of the first control circuits is coupled to a first electrode of one light-emitting component, and each of first power supply voltage signal lines is coupled to at least two first control circuits.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a national phase entry under 35 USC 371 of International Patent Application No. PCT/CN2020/077881 filed on Mar. 5, 2020, which is incorporated herein by reference in their entirety.

TECHNICAL FIELD

The present disclosure relates to the field of display technologies, and in particularly, to a light-emitting substrate and a driving method thereof, a light-emitting module, and a display apparatus.

BACKGROUND

In the field of display technologies, an application of a high-dynamic range (HDR) image technology in display apparatus can improve image quality of display images, but put forward higher requirements on color gamut and brightness of the display apparatus as well. The mini light-emitting diode has small size and high brightness, and may be widely applied to a backlight module of a display apparatus. Moreover, it may finely adjust the backlight, so as to realize a display of images with a high dynamic range.

SUMMARY

In an aspect, a light-emitting substrate is provided. The light-emitting substrate includes a base, a plurality of light-emitting components, a plurality of first power supply voltage signal lines, and a plurality of first control circuits. The plurality of light-emitting components are disposed on the base, and one light-emitting components is located within one light-emitting area. The plurality of first power supply voltage signal lines are disposed on the base and arranged at intervals. The plurality of first control circuits are disposed on the base, each of the first control circuits is coupled to a first electrode of one light-emitting component, and each of the first power supply voltage signal lines is coupled to at least two first control circuits. The first control circuit is configured to transmit a first power supply voltage signal from the first power supply voltage signal line to a first electrode of a light-emitting component coupled to the first control circuit, so as to control an amplitude of a current flowing through the light-emitting component.

light-emitting areas are arranged in an array, and the plurality of first control circuits are arranged in an array. The light-emitting components in a same row of light-emitting areas are coupled to one first power supply voltage signal line through a row of first control circuits, or, light-emitting components in a same column of light-emitting areas are coupled to one first power supply voltage signal line through a column of first control circuits.

In some embodiments, the first control circuit is configured to receive a first light-emission signal and a first enable signal, and transmit the first power supply voltage signal to the first electrode of the light-emitting component coupled to the first control circuit according to the first light-emission signal and the first enable signal, so as to control the amplitude of the current flowing through the light-emitting component. The first control circuit includes: a processor, an analog-to-digital converter, and a first output sub-circuit. The processor is configured to receive the first light-emission signal, convert a format of the first light-emission signal, and generate a second light-emission signal. The analog-to-digital converter is configured to receive the first enable signal and generate a reference signal. The first output sub-circuit is coupled to the processor, the analog-to-digital converter, the first power supply voltage signal line, and the first electrode of the light-emitting component. The first output sub-circuit is configured to transmit the first power supply voltage signal from the first power supply voltage signal line to the first electrode of the light-emitting component according to the second light-emission signal from the processor and the reference signal from the analog-to-digital converter.

In some embodiments, the first output sub-circuit includes: a first transistor, a first resistor, a comparator, and a second transistor. A control electrode of the first transistor is coupled to the processor, and a second electrode of the first transistor is coupled to the first electrode of the light-emitting component. A first end of the first resistor is coupled to the first power supply voltage signal line. A non-inverting input terminal of the comparator is coupled to an output terminal of the analog-to-digital converter, and an inverting input terminal of the comparator is coupled to a second end of the first resistor. A control electrode of the second transistor is coupled to an output terminal of the comparator, a first electrode of the second transistor is coupled to the second end of the first resistor, and a second electrode of the second transistor is coupled to a first electrode of the first transistor.

In some embodiments, the light-emitting substrate includes a first control chip including the first control circuit. The first control chip further includes: a first interface, a second interface, a third interface, and a fourth interface. The first interface is coupled to the processor in the first control circuit, and the first interface is configured to receive the first light-emission signal, and transmit the first light-emission signal to the processor. The second interface is coupled to the analog-to-digital converter in the first control circuit, and the second interface is configured to receive the first enable signal, and transmit the first enable signal to the analog-to-digital converter. The third interface is coupled to the first power supply voltage signal line and the first output sub-circuit in the first control circuit, and the third interface is configured to receive the first power supply voltage signal from the first power supply voltage signal line, and transmit the first power supply voltage signal to the first output sub-circuit. The fourth interface is coupled to the first output sub-circuit in the first control circuit and the first electrode of the light-emitting component, and the fourth interface is configured to transmit the first power supply voltage signal passing through the first output sub-circuit to the first electrode of the light-emitting component.

In some embodiments, the light-emitting substrate further includes a second control circuit disposed on the base. The second control circuit is coupled to the plurality of first control circuits. The second control circuit is configured to receive a driving signal, and transmit the first light-emission signal and the first enable signal to each of the first control circuits according to the driving signal.

In some embodiments, the second control circuit includes: a timing control sub-circuit, a data processing sub-circuit, a memory, and an amplifier sub-circuit. The timing control sub-circuit is configured to generate a clock signal. The data processing sub-circuit is coupled to the timing control sub-circuit and the plurality of first control circuits. The data processing sub-circuit is configured to receive the driving signal, and output a second enable signal according to the driving signal and the clock signal from the timing control sub-circuit, and transmit the first light-emission signal to the plurality of first control circuits. The memory is configured to store a timing data and a light-emission current data for a preset light-emission mode. The amplifier sub-circuit is coupled to the data processing sub-circuit, the memory and the plurality of first control circuits. The amplifier sub-circuit is configured to amplify a power of the second enable signal from the data processing sub-circuit according to the timing data and the light-emission current data for the preset light-emission mode, generate the first enable signal, and transmit the first enable signal to the plurality of first control circuits.

In some embodiments, the light-emitting substrate includes a second control chip including the second control circuit. The second control chip further includes a plurality of enable signal interfaces, a plurality of light-emission signal interfaces and a driving signal interface. The plurality of enable signal interfaces are coupled to the amplifier sub-circuit in the second control circuit, and each of the enable signal interfaces is coupled to at least one of the first control circuits. The enable signal interfaces are configured to receive the first enable signal from the amplifier sub-circuit, and transmit the first enable signal to the first control circuit coupled thereto. The plurality of light-emission signal interfaces are coupled to the data processing sub-circuit in the second control circuit, and each of the light-emission signal interfaces is coupled to one of the first control circuits. The light-emission signal interfaces are configured to receive the first light-emission signal from the data processing sub-circuit, and transmit the first light-emission signal to the first control circuit coupled thereto. The driving signal interface is coupled to the data processing sub-circuit, and the driving signal interface is configured to receive the driving signal and transmit the driving signal to the data processing sub-circuit.

In some embodiments, in a case where the plurality of first control circuits are arranged in the array, each of the enable signal interfaces is coupled to a row or a column of the first control circuits.

In some embodiments, the light-emitting substrate further includes a plurality of second power supply voltage signal lines disposed on the base and arranged at intervals. Second electrodes of the light-emitting components in at least two light-emitting areas are coupled to one of the second power supply voltage signal lines.

In some embodiments, in a case where the plurality of light-emitting areas are arranged in the array, light-emitting components in a same row or a same column of the light-emitting areas are coupled to one of the second power supply voltage signal lines.

In some embodiments, the first power supply voltage signal line and the second power supply voltage signal line both extend in a column direction, or both extend in a row direction.

In some embodiments, the second power supply voltage signal line and the first power supply voltage signal line are of a same material and are disposed on a same layer.

In some embodiments, the light-emitting substrate further includes an insulating layer. In a direction perpendicular to the base, the first power supply voltage signal line and the second power supply voltage signal line are located on a side, proximate to the base, of the insulating layer, and the light-emitting component and the first control circuit are located on a side, away from the base, of the insulating layer. The insulating layer is provided with a first via and a second via, and the first control circuit is coupled to the first power supply voltage signal line through the first via; and the second electrode of the light-emitting component is coupled to the second power supply voltage signal line through the second via.

In some embodiments, in a case where the light-emitting substrate further includes the second control circuit, the light-emitting substrate further includes: a plurality of connecting leads disposed on the side, away from the base, of the insulating layer, and the plurality of connecting leads are configured to couple respective first control circuits with the second control circuits.

In some embodiments, the light-emitting component includes: a plurality of light-emitting devices and a plurality of conductive patterns. The plurality of light-emitting devices are arranged in an array. The plurality of light-emitting devices are sequentially connected in series by the plurality of conductive patterns. In a line formed by the plurality of light-emitting devices that are sequentially connected in series, a cathode of one of two light-emitting devices at both ends of the line is the first electrode of the light-emitting component, and an anode of another light-emitting device of the two light-emitting devices is the second electrode of the light-emitting component.

In another aspect, a light-emitting module is provided. The light-emitting module includes the light-emitting substrate as described in any of the above embodiments, a flexible circuit board and a power supply chip. The light-emitting substrate includes the first power supply voltage signal line and the second power supply voltage signal line. The power supply chip is bound to the light-emitting substrate through the flexible circuit board, and the power supply chip is configured to transmit the first power supply voltage signal to the first power supply voltage signal line, and transmit a second power supply voltage signal to the second power supply voltage signal line.

In yet another aspect, a display apparatus is provided. The display apparatus includes the light-emitting module in the above embodiment and a driving chip. The light-emitting substrate in the light-emitting module includes a plurality of first control circuits and a second control circuit. The driving chip is coupled to the second control circuit, and the driving chip is configured to transmit a driving signal to the second control circuit.

In yet another aspect, a driving method of the light-emitting substrate according to any one of the above embodiments is provided, and the light-emitting substrate includes a plurality of first control circuits and a second control circuit. The driving method of the light-emitting substrate includes: receiving, by the second control circuit, a driving signal, transmitting, by the second control circuit, a first light-emission signal and a first enable signal to each of the first control circuits according to the driving signal, and transmitting, by the first control circuit, the first power supply voltage signal from the first power supply voltage signal line to the first electrode of the light-emitting component coupled to the first control circuit according to the first light-emission signal and the first enable signal to control an amplitude of a current flowing through the light-emitting component.

In some embodiments, in a case where the plurality of first control circuits in the light-emitting substrate are arranged in the array, the transmitting, by the second control circuit, the first enable signal to each of the first control circuits includes: transmitting, by the second control circuit, the first enable signal to each row of the first control circuits row by row in a driving period, so as to control each row of the first control circuits to be turned on sequentially and a previous row of the first control circuits in to be turned off before a next row of the first control circuits are turned on.

In some embodiments, in a case where the plurality of first control circuits in the light-emitting substrate are arranged in the array, the transmitting, by the second control circuit, the first enable signal to each of the first control circuits includes: simultaneously transmitting, by the second control circuit, the first enable signal to each row of the first control circuits in a driving period, so as to control each row of the first control circuits to be turned on simultaneously, and each row of the first control circuits to be turned off in a current driving period before each row of the first control circuits are turned on in a next driving period.

In some embodiments, in a case where the plurality of first control circuits in the light-emitting substrate are arranged in the array, the transmitting, by the second control circuit, the first enable signal to each of the first control circuits includes: sequentially transmitting, by the second control circuit, the first enable signal to each row of the first control circuits in a driving period, so as to control each row of the first control circuits to be turned on sequentially, and each row of the first control circuits to be turned off in a current driving period before each row of the first control circuits are turned on in a next driving period.

In some embodiments, in a case where the first control circuit includes the processor, the analog-to-digital converter, and the first output sub-circuit, the transmitting, by the first control circuit, the first power supply voltage signal from the first power supply voltage signal line to the first electrode of the light-emitting component coupled to the first control circuit according to the first light-emission signal and the first enable signal includes: the processor receiving the first light-emission signal, converting the format of the first light-emission signal, and generating a second light-emission signal; the analog-to-digital converter receiving the first enable signal and generating a reference signal; and the first output sub-circuit transmitting the first power supply voltage signal from the first power supply voltage signal line to the first electrode of the light-emitting component according to the second light-emission signal and the reference signal.

In some embodiments, in a case where the second control circuit includes the timing control sub-circuit, the data processing sub-circuit, the memory, and the amplifier sub-circuit, the receiving the driving signal and transmitting the first light-emission signal and the first enable signal to each of the first control circuits according to the driving signal by the second control circuit includes: the timing control sub-circuit generating the clock signal; the data processing sub-circuit receiving the driving signal, outputting the second enable signal according to the driving signal and the clock signal from the timing control sub-circuit, and transmitting the first light-emission signal to the plurality of first control circuits; the memory storing the timing data and the light-emission current data for the preset light-emission mode; and the amplifier sub-circuit amplifying the power of the second enable signal from the data processing sub-circuit according to the timing data and the light-emission current data for the preset light-emission mode from the memory, generating the first enable signal, and transmitting the first enable signal to the plurality of first control circuits.

DETAILED DESCRIPTION

Technical solutions in some embodiments of the present disclosure will be described below clearly and completely with reference to the drawings. However, the described embodiments are merely some but not all embodiments of the present disclosure. All other embodiments obtained on a basis of the embodiments of the present disclosure by a person of ordinary skill in the art shall be included in the protection scope of the present disclosure.

In the description of some embodiments, the terms such as “coupled” and “connected” and their extensions may be used. For example, some embodiments may be described using the term “connected” to indicate that two or more elements are in direct physical contact or electrical contact with each other. For another example, term “coupled” may be used in the description of some embodiments to indicate that two or more components are in direct physical or electrical contact. However, the term “coupled” or “communicatively coupled” may also mean that two or more elements are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content herein.

In the related art, as shown inFIG. 1, a light-emitting substrate100′ includes a plurality of light-emitting components20′. Each light-emitting component20′ is coupled to one first power supply voltage signal line LV1′ and one second power supply voltage signal line LV2′. The first power supply voltage signal line LV1′ and the second power supply voltage signal line LV2′ respectively transmit a first power supply voltage signal and a second power supply voltage signal to the light-emitting component20′, so as to control an amplitude of a current flowing through the light-emitting component20′. The first power supply voltage signal line LV1′ and the second power supply voltage signal line LV2′ need to be led out to a surface of a peripheral region of the light-emitting substrate100′ through vias, and then are bound to an external driving circuit through a flexible circuit board. In a case where the light-emitting substrate100′ is of a hard material (such as glass), it is difficult to form a via and requires a high production process precision. The number of traces on the light-emitting substrate100′ is large. Limited by a limit distance between gold fingers on the flexible circuit board and a size of the flexible circuit board, the light-emitting substrate100′ needs to be connected to a plurality of flexible circuit boards to meet the requirements, which results in a higher production cost.

Some embodiments of the present disclosure provide a light-emitting substrate100. As shown inFIG. 2, the light-emitting substrate100includes a plurality of light-emitting areas S. The light-emitting substrate100includes a base10, a plurality of light-emitting components20, a plurality of first power supply voltage signal lines LV1, and a plurality of first control circuits30.

The plurality of light-emitting components20are disposed on the base10, and one light-emitting component20is located within one light-emitting area S.

The plurality of first power supply voltage signal lines LV1are disposed on the base10and arranged at intervals.

The plurality of first control circuits30are disposed on the base10, each of the first control circuits30is coupled to a first electrode of one light-emitting component20, and each of the first power supply voltage signal lines LV1is coupled to at least two first control circuits30.

The first control circuit30is configured to transmit a first power supply voltage signal from the first power supply voltage signal line LV1to the first electrode of the light-emitting component20coupled to the first control circuit30, so as to control an amplitude of a current flowing through the light-emitting component20.

For example, the first power supply voltage signal is a direct current low voltage signal.

On this basis, each of the first control circuits30in the light-emitting substrate100is coupled to the first electrode of one light-emitting component20, and each first power supply voltage signal line LV1is coupled to at least two first control circuits30, which reduces the number of signal lines (for example, the first power supply voltage signal lines LV1) on the light-emitting substrate100and a voltage drop on the signal line, and improves a stability of the signal. Moreover, the first control circuit30transmits the first power supply voltage signal to a first electrode of a light-emitting component20coupled to the first control circuit30, and the first power supply voltage signal determines the amplitude of the current transmitted to the light-emitting component20. Meanwhile, the first control circuit30may control a duration for which the first power supply voltage signal is transmitted to the light-emitting component20; and the amplitude of the current and the duration together determine a light-emitting brightness of the light-emitting component20.

Therefore, in the light-emitting substrate100provided in the embodiments of the present disclosure, each of the first control circuits30is coupled to the first electrode of the light-emitting component20, each of the first power supply voltage signal lines LV1is coupled to at least two first control circuits30, and the first control circuit30transmits the first power supply voltage signal from the first power supply voltage signal line LV1to the first electrode of the light-emitting component20coupled to the first control circuit30, so as to control the amplitude of the current flowing through the light-emitting component20and the duration.

In this way, the first control circuit30controls the duration for which the first power supply voltage signal is transmitted to the light-emitting component20, and the first power supply voltage signal determines the amplitude of the current transmitted to the light-emitting component20, so that the light-emitting brightness of the light-emitting component20can be controlled jointly by the amplitude of the current and the duration. In addition, compared to one first power supply voltage signal line LV1being coupled to one light-emitting component20, the number of the signal lines (for example, the first power supply voltage signal lines LV1) of the light-emitting substrate100is reduced, which simplifies a wiring design of the light-emitting substrate100. Since the number of the signal lines is reduced, a spacing between the signal lines is increased. As a result, a width of the signal line may be appropriately increased with a thickness of the signal line reduced, so that an impedance of the signal line and thus the voltage drop on the signal line are reduced, which improves the stability of the signal. In a case where, for example, a flexible circuit board is used to bind the external driving circuit to the light-emitting substrate100, since the number of the wires is reduced, the number of flexible circuit boards may be reduced accordingly, so that the production cost is reduced.

In some embodiments, as shown inFIG. 2, the plurality of light-emitting areas S are arranged in an array, and the plurality of first control circuits30are arranged in an array.

For example, as shown inFIG. 2, light-emitting areas S arranged in a row in a horizontal direction X are referred to as a row of light-emitting areas, and light-emitting areas S arranged in a row in a vertical direction Y are referred to as a column of light-emitting areas. First control circuits30arranged in a row in the horizontal direction X are referred to as a row of first control circuits, and first control circuits30arranged in a row in the vertical direction Y are referred to as a column of first control circuits.

As shown inFIG. 3, the light-emitting components20in a same row of the light-emitting areas S are coupled to one first power supply voltage signal line LV1through a row of first control circuits30, or, as shown inFIG. 2, the light-emitting components20in a same column of the light-emitting areas S are coupled to one first power supply voltage signal line LV1through a column of first control circuits30.

For example, the light-emitting substrate100includes light-emitting areas S arranged in n rows and m columns and first control circuits30arranged in n rows and m columns, in which n and m are both positive integers. One light-emitting area S corresponds to one first control circuit30. In a case where the light-emitting components20in a same row of light-emitting areas S are coupled to one first power supply voltage signal line LV1through a row of first control circuits30, the first power supply voltage signal line LV1extends in the row direction (i.e., the horizontal direction X inFIG. 3), and in this case, the number of the first power supply voltage signal lines LV1is n. In a case where the light-emitting components20in a same column of light-emitting areas S are coupled to one first power supply voltage signal line LV1through a column of first control circuits30, the first power supply voltage signal line LV1extends in the column direction (i.e., the vertical direction Y inFIG. 2), and in this case the number of the first power supply voltage signal lines LV1is m.

Therefore, compared to the light-emitting substrate100′ shown inFIG. 1where one first power supply voltage signal line LV1′ is coupled to light-emitting components20′ in one light-emitting area S′ and the number of the first power supply voltage signal lines LV1′ is (n×m), the number of the first power supply voltage signal lines LV1in the light-emitting substrate100in the embodiments of the present disclosure is reduced. For example, in a case where the first power supply voltage signal line LV1extends in the row direction, the number of the first power supply voltage signal line LV1is n; and in a case where the first power supply voltage signal line LV1extends in the column direction, the number of the first power supply voltage signal lines LV1is m, which reduces the number of the signal lines of the light-emitting substrate100, and simplifies the wiring design of the light-emitting substrate100. Since the number of the signal lines is reduced, a design spacing between the signal lines may be relatively increased. Therefore, the width of the signal line may be appropriately increased to reduce the impedance of the signal line and the voltage drop on the signal line, which improves the stability of the signal.

In some embodiments, referring toFIG. 4, the first control circuit30is configured to receive a first light-emission signal EM1and a first enable signal PW1, and transmit a first powers supply voltage signal V1to the first electrode of the light-emitting component20coupled to the first control circuit30according to the first light-emission signal EM1and the first enable signal PW1, so as to control the amplitude of the current flowing through the light-emitting component20.

It will be noted that, referring toFIG. 4, V1represents the first power supply voltage signal from the first power supply voltage signal line LV1.

The first light-emission signal EM1received by the first control circuit30is a light-emission data for the light-emitting component20coupled to the first control circuit30. For example, the first light-emission signal EM1includes a pulse width modulation (PWM) signal. The first enable signal PW1received by the first control circuit30is a signal for driving the first control circuit30to be turned on. For example, the first enable signal PW1includes a power signal.

As shown inFIG. 4, the first control circuit30includes: a processor31, an analog-to-digital converter ADC and a first output sub-circuit32.

The processor31is configured to receive the first light-emission signal EM1and convert a format of the first light-emission signal EM1to generate a second light-emission signal EM2.

It will be noted that, the processor31converts the first light-emission signal EM1into the second light-emission signal EM2to match a format of a signal required for an operation of the first control circuit30. A specific conversion manner is not limited here, which can be set by a person skilled in the art according to actual product requirements. For example, the first light-emission signal EM1and the second light-emission signal EM2may both be PWM signals with different formats.

The analog-to-digital converter ADC is configured to receive the first enable signal PW1and generate a reference signal REF.

It can be understood that, the first enable signal PW1is an analog signal, and the reference signal REF is a digital signal. The analog-to-digital converter ADC generates reference signals REF with different potentials according to received first enable signals PW1with different potentials.

The first output sub-circuit32is configured to transmit the first power supply voltage signal V1from the first power supply voltage signal line LV1to the first electrode of the light-emitting component20according to the second light-emission signal EM2from the processor31and the reference signal REF from the analog-to-digital converter ADC.

Potentials of the second light-emission signal EM2generated by respective first control circuits30are not completely the same as those of the reference signal REF. In this case, the first output sub-circuit32is turned on under a control of the second light-emission signal EM2and the reference signal REF, and transmits the first power supply voltage signal to the first electrode of the light-emitting component20. By adjusting the potential of the second light-emission signal EM2, turning-on duration of respective first control circuits30are not completely the same, so that a duration for which the first power supply voltage signal V1is transmitted to the first electrode of the light-emitting component20can be adjusted and an operating time of the light-emitting component20can be controlled. By adjusting the potential of the reference signal REF, the amplitude of the current flowing through the light-emitting component20can be controlled.

It will be noted that, when the light-emitting substrate100is applied to a display apparatus, potentials of first enable signals PW1received by respective first control circuits30may be the same or may be different. In a case where the potentials of the first enable signals PW1received by respective first control circuits30are the same, the reference signals REF generated by respective first control circuits30are the same. The duration for which the first power supply voltage signal V1is transmitted to the first electrode of the light-emitting component20may be adjusted according to the received different first light-emission signals EM1. In a case where the potentials of the first enable signals PW1received by respective first control circuits30are different, the reference signals REF generated by respective first control circuits30are different, so that the amplitude of the current flowing through the light-emitting component20may be adjusted. Therefore, the brightness of the light-emitting component20in the light-emitting area S is adjusted by controlling the amplitude of the current flowing through the light-emitting component20and the duration according to the received first enable signal PW1and the first light-emission signal EM1.

For example, as shown inFIG. 5, the first output sub-circuit32includes: a first transistor M1, a first resistor R1, a comparator A, and a second transistor M2.

A control electrode of the first transistor M1is coupled to the processor31, and a second electrode of the first transistor M1is coupled to the first electrode of the light-emitting component20.

A first end of the first resistor R1is coupled to the first power supply voltage signal line LV1.

A non-inverting input terminal of the comparator A is coupled to an output terminal of the analog-to-digital converter ADC, and an inverting input terminal of the comparator A is coupled to a second end of the first resistor R1.

A control electrode of the second transistor M2is coupled to an output terminal of the comparator A, a first electrode of the second transistor M2is coupled to the second end of the first resistor R1, and a second electrode of the second transistor M2is coupled to the first electrode of the first transistor M1.

In this case, the comparator A compares the first power supply voltage signal V1transmitted through the first resistor R1with the reference signal REF from the analog-to-digital converter ADC, and transmits the compared signal to the second transistor M2to control a turning-on of the second transistor M2. Since potentials of the first enable signals PW1received by the first control circuits30coupled to different light-emitting components20are not completely the same, potentials of the reference signals REF generated according to the first enable signals PW1are not completely the same. As a result, the reference signals REF whose potentials are not completely the same may be generated by adjusting the potentials of the first enable signals PW1so as to control the amplitude of the current flowing through the second transistor M2, and control the amplitude of the current flowing through the light-emitting component20.

In addition, the processor31converts the format of the first light-emission signal EM1to generate the second light-emission signal EM2, and the first transistor M1is turned on under a control of the second light-emission signal EM2. Since the potentials of the first light-emission signals EM1corresponding to different light-emitting components20are not completely the same, and the potentials of the second light-emission signals EM2are not completely the same either, a turning-on duration of the first transistor M1in each first control circuit30may be controlled by adjusting the potentials of the first light-emission signals EM1to generate the second light-emission signals EM2with potentials which are not completely the same, so as to control the duration for which the first power supply voltage signal V1is transmitted to the first electrode of the light-emitting component20through the first output sub-circuit32.

It will be noted that, the transistors may be thin film transistors, field-effect transistors or other switching devices with same characteristics, which is not limited in the embodiments of the present disclosure. The control electrode of the transistor is a gate of the transistor, the first electrode is one of a source and a drain of the transistor, and the second electrode is another one of the source and the drain of the transistor. Since the source and the drain of the transistor may be symmetrical in structure, there may be no difference in structure between the source and the drain of the transistor. That is, there may be no difference in structure between the first electrode and the second electrode of the transistor in the embodiments of the present disclosure. For example, in a case where the transistor is a P-type transistor, the first electrode of the transistor is the source, and the second electrode of the transistor is the drain. For example, in a case where the transistor is an N-type transistor, the first electrode of the transistor is the drain, and the second electrode of the transistor is the source.

In some embodiments, as shown inFIG. 6, the light-emitting substrate100includes a first control chip101. The first control chip101includes the first control circuit30.

The first control chip101further includes: a first interface P1, a second interface P2, a third interface P3, and a fourth interface P4.

The first interface P1is coupled to the processor31in the first control circuit30.

The second interface P2is coupled to the analog-to-digital converter ADC in the first control circuit30.

The third interface P3is coupled to the first power supply voltage signal line LV1and the first output sub-circuit32in the first control circuit30.

The fourth interface P4is coupled to the first output sub-circuit32in the first control circuit30and the first electrode of the light-emitting component20.

The first interface P1is configured to receive the first light-emission signal EM1and transmit the first light-emission signal EM1to the processor31.

The second interface P2is configured to receive the first enable signal PW1and transmit the first enable signal PW1to the analog-to-digital converter ADC.

The third interface P3is configured to receive the first power supply voltage signal V1from the first power supply voltage signal line LV1and transmit the first power supply voltage signal to the first output sub-circuit32.

The fourth interface P4is configured to transmit the first power supply voltage signal transmitted through the first output sub-circuit32to the first electrode of the light-emitting component20.

In this case, the first control chip101controls the duration for which the first power supply voltage signal V1is transmitted to a light-emitting component20coupled thereto according to the received first light-emission signal EM1and the first enable signal PW1, so as to control the amplitude of the current flowing through the light-emitting component20coupled to the first control chip101and the duration. In addition, the number of interfaces of the first control chip101is small, and a size of the first control chip101is in an order of micrometer, which causes the first control chip101to have a small effect on an area of an effective light-emitting region in the light-emitting substrate100.

In some embodiments, as shown inFIG. 7, the light-emitting substrate100further includes a second control circuit40disposed on the base10. The second control circuit40is coupled to the plurality of first control circuits30.

The second control circuit40is configured to receive a driving signal, and transmit the first light-emission signal EM1and the first enable signal PW1to each first control circuit30according to the driving signal.

In some embodiments, as shown inFIG. 8, the second control circuit40includes: a timing control sub-circuit41, a data processing sub-circuit42, a memory43, and an amplifier sub-circuit44.

The data processing sub-circuit42is coupled to the timing control sub-circuit41and the plurality of first control circuits30.

The amplifier sub-circuit44is coupled to the data processing sub-circuit42, the memory43and the plurality of first control circuits30.

The timing control sub-circuit41is configured to generate a clock signal.

The data processing sub-circuit42is configured to receive a driving signal DRV, output a second enable signal PW2according to the driving signal DRV and a clock signal from the timing control sub-circuit41, and transmit the first light-emission signal EM1to the plurality of first control circuits30.

The memory43is configured to store a timing data and light-emission current data for a preset light-emission mode.

t will be noted that, in the case where the light-emitting substrate100is applied to the display apparatus, a person skilled in the art may set a light-emission mode of the light-emitting substrate100according to a display mode of the display apparatus, and store the timing data and light-emission current data for the preset light-emission mode.

The amplifier sub-circuit44is configured to amplify a power of the second enable signal PW2from the data processing sub-circuit42according to the timing data and the light-emission current data for the preset light-emission mode, generate the first enable signal PW1, and transmit the first enable signal PW1to the plurality of first control circuits30.

In this case, when the second control circuit40starts to operate, the timing control sub-circuit41generates the clock signal, and the data processing sub-circuit42transmits the first light-emission signal EM1to the plurality of first control circuits30according to the clock signal and the received driving signal DRV, and transmits the second enable signal PW2to the amplifier sub-circuit44. The amplifier sub-circuit44amplifies the power of the second enable signal PW2according to the timing data and the light-emission current data for the preset lighting mode stored in the memory43, generates the first enable signal PW1, transmits the first enable signal PW1to the plurality of first control circuits30, and controls the magnitude of the current of the first control circuit30to drive the plurality of first control circuits30to operate, so as to realize a control of a operation state of the light-emitting component20coupled to the first control circuit30. In addition, the amplifier sub-circuit44amplifies the power of the second enable signal PW2, which may improve a loading capacity of a second control chip102.

In some embodiments, the light-emitting substrate100includes the second control chip102. As shown inFIG. 9, the second control chip102includes the second control circuit40.

The second control chip102further includes: a plurality of enable signal interfaces E, a plurality of light-emission signal interfaces L, and a driving signal interface D.

The plurality of enable signal interfaces E are coupled to the amplifier sub-circuit44in the second control circuit40, and each enable signal interface E is coupled to at least one first control circuit30.

The plurality of light-emission signal interfaces L are coupled to the data processing sub-circuit42in the second control circuit40, and each light-emission signal interface L is coupled to one first control circuit30.

For example, in a case where the light-emitting substrate100includes the first control circuits30arranged in n rows and m columns, as shown inFIG. 9, the first control circuit30in the first row and the first column is coupled to the light-emission signal interface L(1_1), the first control circuit30in the second row and the first column is coupled to the light-emission signal interface L(1_2), the first control circuit30in the n-th row and the first column is coupled to the light-emission signal interface L(1_n), the first control circuit30in the first row and the m-th column is coupled to the light-emission signal interface L(m_1), the first control circuit30in the second row and the m-th column is coupled to the light-emission signal interface L(m_2), and the first control circuit30in the n-th row and the m-th column is coupled to the light-emission signal interface L(m_n).

The driving signal interface D is coupled to the data processing sub-circuit42.

The enable signal interface E is configured to receive the first enable signal PW1from the amplifier sub-circuit44, and transmit the first enable signal PW1to the first control circuit30coupled thereto.

The light-emission signal interface L is configured to receive the first light-emission signal EM1from the data processing sub-circuit42, and transmit the first light-emission signal EM1to the first control circuit30coupled thereto.

The driving signal interface D is configured to receive the driving signal DRV and transmit the driving signal DRV to the data processing sub-circuit42.

The driving signal interface D may be a serial peripheral interface (SPI). As shown inFIG. 10, the driving signal interface D includes a serial clock (SCLK) interface for receiving a serial clock signal generated by a master device, a master output/slave input (MOSI) interface for receiving a data signal transmitted by the master device, and a vertical frame synchronization signal interface Vsync for receiving a vertical frame synchronization signal transmitted by the master device. That is, the driving signal DRV received by the driving signal interface D includes the SCLK signal, the MOSI signal, and the vertical frame synchronization signal Vsync. For example, in a case where the light-emitting substrate100is used in a display apparatus, the master device is the display apparatus, and a slave device is the second control chip102. The driving signal received by the driving signal interface D may be from a System on chip (SOC) or a timing controller (T-con) in the display apparatus.

In addition, as shown inFIG. 10, the second control chip102further includes a control signal interface EN, a master input/slave output (MISO) interface, and a chip select (CS) interface. The control signal interface EN is used to receive the control signal from the master device to control the second control chip102to start operating. For example, when the signal received by the control signal interface EN is of a high level, the second control chip102starts to operate, and when the signal received by the control signal interface EN is of a low level, the second control chip102stops working. The MISO interface is used to transmit data from the second control chip102to the master device. A signal received by the CS interface is used to drive the second control chip102to start transmitting data. For example, when the signal received by the CS interface is active low, the second control chip102performs a data transmission.

In some embodiments, in a case where the plurality of first control circuits30are arranged in the array, each of the enable signal interfaces E is coupled to a row or a column of first control circuits30.

It can be understood that, in a case where each of the enable signal interfaces E is coupled to a row of first control circuits30, the signal output by each of the enable signal interfaces E may control operations of the row of the first control circuits30; and in a case where each of the enable signal interfaces E is coupled to a column of first control circuits30, the signal output by each of the enable signal interfaces E may control operations of the column of the first control circuits30.

For example, in a case where the light-emitting substrate100includes the first control circuit30arranged in n rows and m columns, one enable signal interface E may be coupled to a row of first control circuits30. As shown inFIG. 9, the first control circuits in the first row are coupled to the enable signal interface E(1), the first control circuits in the second row are coupled to the enable signal interface E(2), and the first control circuits in the n-th row are coupled to the enable signal interface E(n).

In some embodiments, as shown inFIG. 2, the light-emitting substrate100further includes a plurality of second power supply voltage signal lines LV2. The plurality of second power supply voltage signal lines LV2are disposed on the base10and arranged at intervals.

Second electrodes of light-emitting components20in at least two light-emitting areas S are coupled to one second power supply voltage signal line LV2.

The second power supply voltage signal line LV2is configured to transmit the second power supply voltage signal to the second electrode of the light-emitting component20coupled thereto.

It will be noted that, referring toFIG. 4, V2represents the second power supply voltage signal from the second power supply voltage signal line LV2.

For example, the second power supply voltage signal V2is a direct current high voltage signal.

In this case, since the second power supply voltage signal V2is transmitted to the second electrode of the light-emitting component20, and the first power supply voltage signal V1is transmitted to the first electrode of the light-emitting component20through the first control circuit30, a operating duration of the light-emitting component20can be controlled by controlling a duration for which the first power supply voltage signal V1is transmitted to the light-emitting component20by the first control circuit30. In addition, the second electrodes of the light-emitting components20in at least two light-emitting areas S in the light-emitting substrate100are coupled to one second power supply voltage signal line LV2, so that the number of second power supply voltage signal lines LV2is reduced, and a wiring design of the light-emitting substrate100is simplified. Since the number of the signal lines is reduced, a spacing between the signal lines is relatively increased. Therefore, the width of the signal line may be appropriately increased to reduce the impedance of the signal line and the voltage drop on the signal line, which improves the stability of the signal. In a case where the flexible circuit board is used to bind the light-emitting substrate100to the external driving circuit, since the number of the wires is reduced, the number of the flexible circuit boards is also reduced accordingly, so that the production cost is reduced.

In some embodiments, in a case where a plurality of light-emitting areas S are arranged in the array, light-emitting components20in a same row or a same column of the light-emitting area are coupled to one second power supply voltage signal line LV2.

For example, the light-emitting substrate100includes light-emitting areas S arranged in n rows and m columns and first control circuits30arranged in n rows and m columns. As shown inFIG. 3, in a case where the light-emitting components20in a same row of light-emitting areas S are coupled to one second power supply voltage signal line LV2, the second power supply voltage signal line LV2extends in the row direction (the horizontal direction X shown inFIG. 3), and in this case, the number of the second power supply voltage signal lines LV2is n. As shown inFIG. 2, in a case where the light-emitting components20in a same column of light-emitting areas S are coupled to one second power supply voltage signal line LV2, the second power supply voltage signal line LV2extends in the column direction (the vertical direction Y shown inFIG. 2), and in this case, the number of the second power supply voltage signal lines LV2is m.

In this case, compared to the light-emitting substrate100′ shown inFIG. 1where one second power supply voltage signal line LV2′ is coupled to light-emitting components20′ in one light-emitting area S′ and the number of the second power supply voltage signal lines LV2′ is (n×m), the number of the second power supply voltage signal lines LV2in the light-emitting substrate100in the embodiments of the present disclosure is reduced. For example, in a case where the second power supply voltage signal line LV2extends in the row direction, the number of the second power supply voltage signal lines LV2is n; and in a case where the second power supply voltage signal line LV2extends in the column direction, the number of the second power supply voltage signal lines LV2is m, which reduces the number of the signal lines of the light-emitting substrate100. Since the number of the signal lines is reduced, the spacing between the signal lines is relatively increased. Therefore, the width of the signal line may be appropriately increased to reduce the impedance of the signal line and the voltage drop on the signal line, which improves the stability of the signal. Moreover, in the case where the flexible circuit board is used to bind the light-emitting substrate100to the external driving circuit, since the number of the wires is reduced, the number of the flexible circuit boards is also reduced accordingly, so that the production cost is reduced.

In some embodiments, the first power supply voltage signal line LV1and the second power supply voltage signal line LV2both extend in the column direction, or both extend in the row direction.

For example, the light-emitting substrate100includes light-emitting areas S arranged in n rows and m columns and first control circuits30arranged in n rows and m columns, and the first power supply voltage signal line LV1and the second power supply voltage signal line LV2extend in the row direction. In this case, a total number of the first power supply voltage signal line LV1and the second power supply voltage signal line LV2is (2×n). In the case where the light-emitting components20in a same column of light-emitting areas S are coupled to one second power supply voltage signal line LV2, the first power supply voltage signal line LV1and the second power supply voltage signal line LV2extend in the column direction, and in this case, a total number of the first power supply voltage signal lines LV1and the second power supply voltage signal lines LV2is (2×m).

Therefore, compared to the light-emitting substrate100′ where one second power supply voltage signal line LV2and one first power supply voltage signal line LV1are coupled to the light-emitting components20in one light-emitting area S and the total number of the first power supply voltage signal lines LV1and the second power supply voltage signal lines LV2is 2×(n×m), the number of the first power supply voltage signal lines LV1and the number of the second power supply voltage signal lines LV2in the light-emitting substrate100in the embodiments of the present disclosure are reduced. For example, in the case where the first power supply voltage signal line LV1and the second power supply voltage signal line LV2extend in the row direction, the total number of the first power supply voltage signal lines LV1and the second power supply voltage signal lines LV2is (2×n), and in a case where the first power supply voltage signal line LV1and the second power supply voltage signal line LV2extend in the column direction, the total number of the first power supply voltage signal lines LV1and the second power supply voltage signal lines LV2is (2×m), which reduces the number of the signal lines of the light-emitting substrate100, and simplifies the wiring design of the light-emitting substrate100. Since the number of the signal lines is reduced, the spacing between the signal lines is relatively increased. Therefore, the width of the signal line may be appropriately increased to reduce the impedance of the signal line and the voltage drop on the signal line, which improves the stability of the signal. Moreover, in a case where the flexible circuit board is used to bind the external driving circuit to the light-emitting substrate100, since the number of the wires is reduced, the number of the flexible circuit boards is also reduced accordingly, so that the production cost is reduced.

In some embodiments, the second power supply voltage signal line LV2and the first power supply voltage signal line LV1are of a same material and are disposed on a same layer.

In terms of process, the second power supply voltage signal line LV2and the first power supply voltage signal line LV1may be formed simultaneously, thereby simplifying the production process.

In some embodiments, as shown inFIGS. 11 and 12, the light-emitting substrate100further includes an insulating layer50.

In a direction perpendicular to the base10, the first power supply voltage signal line LV1and the second power supply voltage signal line LV2are located on a side, proximate to the base10, of the insulating layer50, and the light-emitting component20and the first control circuit30are located on a side, away from the base10, of the insulating layer50.

The insulating layer50is provided with a first via51and a second via52. The first control circuit30is coupled to the first power supply voltage signal line LV1through the first via51, and the second electrode of the light-emitting component20is coupled to the second power supply voltage signal line LV2through the second via52.

The light-emitting substrate100further includes a connection pattern103disposed on the side, away from the base10, of the insulating layer50, and the connection pattern103covers the first via51and the second via52. The first control circuit30is coupled to the first power supply voltage signal line LV1through the connection pattern103and the first via51, and the first control circuit30is also coupled to the first electrode of the light-emitting component20through the connection pattern103. The second electrode of the light-emitting component20is coupled to the second power supply voltage signal line LV2through the connection pattern103and the second via52.

For example, the insulating layer50may be of an inorganic material including silicon nitride (SixNy) or silicon oxide (SiOx).

In some embodiments, as shown inFIG. 7, in a case where the light-emitting substrate100further includes the second control circuit40, the light-emitting substrate100further includes a plurality of connecting leads60disposed on the side, away from the base10, of the insulating layer50.

The plurality of connecting leads60are configured to couple respective first control circuits30with the second control circuit40.

In some embodiments, in a case where the light-emitting substrate100includes the first control chip101and the second control chip102, a part of the plurality of connecting leads60are used to couple the enable signal interfaces E in the second control chip102with the second interfaces P2in each row of the first control chips101, and another part of the plurality of connecting leads60are used to couple the light-emission signal interfaces L in the second control chip102with the first interfaces P1in respective first control chips101. For example, in a case where the light-emitting substrate100includes the first control chips101arranged in n rows and m columns, the second interfaces P2in the first control chips101in the first row are coupled to the enable signal interfaces E(1) in the second control chip102through the connecting lead60, and the second interfaces P2in the first control chips101in the n-th row are coupled to the enable signal interfaces E(n) in the second control chip102through the connecting lead60; and the first interface P1in the first control chip101in the first row and the first column is coupled to the light-emission signal interface L(1_1) in the second control chip102through the connecting lead60, and the first interface P1in the first control chip101in the n-th row and m-th column is coupled to the light-emission signal interface L(m_n) in the second control chip102through the connecting lead60.

For example, the connection lead60may be of a metal material including copper (Cu) or aluminum (Al).

In some embodiments, as shown inFIG. 13, the light-emitting component20includes: a plurality of light-emitting devices21and a plurality of conductive patterns22. The plurality of light-emitting devices21are arranged in an array. The plurality of conductive patterns22sequentially connect the plurality of light-emitting devices21in series.

In a line formed by connecting the plurality of light-emitting devices31in series, a cathode of one of two light-emitting devices31located at both ends of the line is the first electrode of the light-emitting component20, and an anode of another light-emitting device31of the two light-emitting devices is the second electrode of the light-emitting component20.

For example, the light-emitting device31may be an inorganic light-emitting device including a micro LED or a mini LED.

It will be noted that, the plurality of light-emitting devices21are sequentially connected. That is, the plurality of light-emitting devices21are connected in series. In addition, the plurality of light-emitting devices21may also be connected in parallel, or, a part of the plurality of light-emitting devices21are connected in series and then connected in parallel with another part of the light-emitting devices21. Those skilled in the art can select a connection manner of the light-emitting devices21in the light-emitting areas S according to actual conditions, which is not limited in the present disclosure.

For example, in a case where the plurality of light-emitting devices21are connected in series with each other, in a light-emitting area S, a shape of a conductive patterns22for the light-emitting devices21connected in series in a same row is in a fold line shape, and a shape of a conductive pattern22for the light-emitting devices21connected in series in a same column is in a stripe shape; or, the shape of the conductive pattern22for the light-emitting devices21connected in series in a same column is in a fold line shape, and the shape of the conductive pattern22of the light-emitting devices21connected in series in a same row is in a stripe shape.

Since in a direction perpendicular to the base10, the plurality of conductive patterns22are located on a side, away from the base10, of the first power supply voltage signal line LV1and the second power supply voltage signal line LV2, and the plurality of conductive patterns22are located in a different layer from that of the first power supply voltage signal line LV1and the second power supply voltage signal line LV2, the conductive pattern22has little effect on a wiring space of the first power supply voltage signal line LV1and the second power supply voltage signal line LV2. In this way, it is avoided that widths of the first power supply voltage signal line LV1and the second power supply voltage signal line LV2are reduced due to a reduction of a wiring gap between the first power supply voltage signal line LV1and the second power supply voltage signal line LV2, which causes impedances of the first power supply voltage signal line LV1and the second power supply voltage signal line LV2to increase, and affects the signal transmission.

In a case where the light-emitting substrate100includes the connection pattern103, the conductive pattern22and the connection pattern103are made of a same material and disposed on a same layer. In terms of process, the conductive pattern22and the connection pattern103are formed through a same one film forming process. It will be noted that, in some embodiments of the present disclosure, the first control circuit30may be disposed outside the light-emitting area S and adjacent to the light-emitting component20. As shown inFIG. 13, in other embodiments of the present disclosure, the first control circuit30may be directly disposed within the light-emitting area S. For example, an orthographic projection of the first control circuit30on the base and an orthographic projection of any one of the conductive pattern22, the connection pattern103, the light-emitting device31, the first power supply voltage signal line LV1and the second power supply voltage signal line LV2on the base may not overlap. Of course, the orthographic projection of the first control circuit30on the base may also partially overlap the orthographic projection of any one of the conductive pattern22, the connection pattern103, the light-emitting device31, the first power supply voltage signal line LV1and the second power supply voltage signal line LV2on the base.

Some embodiments of the present disclosure provide a light-emitting module200, as shown inFIG. 14, which includes: the light-emitting substrate100as described in any of the above embodiments, a flexible circuit board201and a power supply chip202.

The light-emitting substrate100includes the first power supply voltage signal line LV1and the second power supply voltage signal line LV2.

The power supply chip202is bound to the light-emitting substrate100through the flexible circuit board201. The power supply chip202is configured to transmit the first power supply voltage signal to the first power supply voltage signal line LV1and transmit the second power supply voltage signal to the second power supply voltage signal line LV2.

In some embodiments, referring toFIG. 7, in a case where the light-emitting substrate100includes the second control circuit40, the power supply chip202is configured to transmit a third power supply voltage signal and a fourth supply power supply voltage signal to the second control circuit40.

For example, in a case where the light-emitting substrate100includes the second control chip102, as shown inFIG. 10, the second control chip102further includes a third power supply voltage signal interface VDD and a fourth power supply voltage signal interface GND. The third power supply voltage signal interface VDD is configured to receive the third power supply voltage signal from the power supply chip202, and the fourth power supply voltage signal interface GND is configured to receive the fourth power supply voltage signal from the power supply chip202.

The third power supply voltage signal is a direct current high voltage signal, such as a signal from a positive pole of a power source, and the fourth power supply voltage signal is a direct current low voltage signal, such as a signal from the negative electrode of the power supply. A potential of the third power supply voltage signal is higher than a potential of the second power supply voltage signal. A potential of the fourth power supply voltage signal is equal to a potential of the first power supply voltage signal.

The embodiments of the present disclosure further provide a display apparatus300, as shown inFIG. 15, which includes: the light-emitting module200as described in any of the above embodiments and a driving chip301.

The light-emitting substrate100in the light-emitting module200includes a plurality of first control circuits30and a second control circuit40. The driving chip301is coupled to the second control circuit40. The driving chip301is configured to transmit a driving signal to the second control circuit40.

For example, the driving chip301may be a SOC or a T-con.

In this case, the driving chip301transmits the driving signal to the second control circuit40. The second control circuit40receives the driving signal, and transmits the first light-emission signal and the first enable signal to each first control circuit30according to the driving signal. The first control circuit30receives the first light-emission signal and the first enable signal, and transmits the first power supply voltage signal to the first electrode of the light-emitting component20coupled to the first control circuit30according to the first light-emission signal and the first enable signal to control the amplitude of the current flowing through the light-emitting component20and thus to control the light-emitting brightness of the light-emitting component20.

In some embodiments, in a case where the display apparatus300is a liquid crystal display apparatus, the light-emitting module200is a backlight module. As shown inFIG. 16, the display apparatus300further includes an array substrate400, a counter substrate500and a liquid crystal layer600. The counter substrate500is disposed opposite to the array substrate400, and the light-emitting module200is disposed on a side, away from the counter substrate500, of the array substrate400. The liquid crystal layer600is located between the counter substrate500and the array substrate400.

For example, in a display process of the display apparatus300, liquid crystal molecules in the liquid crystal layer600are deflected under an action of an electric field formed between a pixel electrode401and a common electrode402in the array substrate400, and light emitted by the light-emitting module200passes through the liquid crystal layer600and exits from a side, away from the light-emitting module200, of the counter substrate500.

The display apparatus300can be any apparatus that displays an image, moving (for example a video) or still (for example a static image), literal or graphical. More specifically, it is contemplated that the described embodiments may be implemented in or associated with a variety of electronic apparatus. The variety of electronic apparatus may include (but not limit to), for example, mobile telephones, wireless apparatus, personal data assistant (PAD), hand-held or portable computers, global positioning system (GPS) receivers/navigators, cameras, MPEG-4 Part 14 (MP4) video players, a vidicon, game consoles, watches, clocks, calculators, TV monitors, flat panel displays, computer monitors, car displays (such as odometer display etc.), navigators, cockpit controllers and/or displays, camera view displays (such as rear view camera display in a vehicle), electronic photos, electronic billboards or signages, projectors, building structures, packaging and aesthetic structures (such as a display for an image of a piece of jewelry) etc.

The embodiments of the present disclosure further provide a method for driving a light-emitting substrate. The light-emitting substrate is the light-emitting substrate100as described in any of the above embodiments. Referring toFIG. 8, the light-emitting substrate100includes the first control circuit30and the second control circuit40.

The method for driving the light-emitting substrate100includes the following steps.

The second control circuit40receives the driving signal DRV, and transmits the first light-emission signal EM1and the first enable signal PW1to each first control circuit30according to the driving signal DRV.

The first control circuit30transmits the first power supply voltage signal V1from the first power supply voltage signal line LV1to the first electrode of the light-emitting component20coupled to the first control circuit30according to the first light-emission signal EM1and the first enable signal PW1, so as to control the amplitude of current flowing through the light-emitting component20.

In this case, the second control circuit40transmits the first light-emission signal EM1and the first enable signal PW1to the first control circuit30coupled to the light-emitting component20in the light-emitting area S according to the driving signal DRV. Potentials of the first light-emission signals EM1and the first enable signals PW1received by the first control circuits30coupled to different light-emitting components20are not completely the same. The first control circuit30transmits the first power supply voltage signal V1to the first electrode of the light-emitting component20coupled to the first control circuit30according to the first enable signal PW1and the first light-emission signal EM1. By adjusting the potential of the first light-emission signal EM1and controlling the operating duration of the light-emitting component20, and by adjusting the potential of the first enable signal PW1and controlling the amplitude of the current flowing through the light-emitting component20, the light-emitting brightness of the light-emitting components20in respective light-emitting area S is controlled.

In some embodiments, in a case where the plurality of first control circuits30in the light-emitting substrate100are arranged in the array, the transmitting, by the second control circuit40, the first enable signal PW1to each first control circuit30includes:

Transmitting, by the second control circuit40, the first enable signal PW1to each row of the first control circuit row by row in a driving period, so as to control each row of the first control circuits30to be turned on sequentially, and a previous row of the first control circuits to be turned off before a next row of the first control circuits are turned on.

For example, referring toFIG. 17, the plurality of light-emitting areas (S(1_1) . . . S(m_n)) are arranged in n rows and m columns. For example, a light-emitting area S(1_1) is a light-emitting area in the first row and the 1st column, the light-emitting area S(m_n) is a light-emitting area in the n-th row and the m-th column, and the plurality of first control circuits30are arranged in n rows and m columns. In a driving period F (as shown inFIG. 19), the second control circuit40transmits the first enable signals (PW1(1) . . . PW1(n)) row by row to the first control circuits30from the first row to the n-th row, and controls each row of the first control circuits30to be turned on sequentially. Moreover, the second control circuit40transmits the first light-emission signal EM1to each first control circuit30. For example, when the first row of the first control circuits30receive the first enable signal PW1(1), the second control circuit40transmits the first light-emission signal EM1to the first control circuits30in the first row and the first column through the first row and the m-th column.

In this case, the first control circuit30is turned on under the control of the first enable signal PW1and the first light-emission signal EM1, and transmits the first power supply voltage signal V1from the first power supply voltage signal line LV1to the first electrode of the light-emitting component20in the light-emitting area S coupled to the first control circuit30, so as to cause the light-emitting component20to operate.

For example, referring toFIG. 18, in a case where the light-emitting substrate100includes the first control chip101and the second control chip102, the enable signal interface E in the second control chip102is coupled to the second interface P2in the first control chip101, and each enable signal interface E is coupled to one row of first control circuits30. For example, the enable signal interface E(1) is coupled to the first row of the first control circuits30, the enable signal interface E(2) is coupled to the second row of the first control circuits30, and the enable signal interface E(n) is coupled to the n-th row of the first control circuits30. In this case, the plurality of enable signal interfaces (E(1), E(2) . . . E(n−1), E(n)) of the second control chip102sequentially transmit the first enable signals (PW1(1) . . . PW1(n)) to the first control circuits30in the first row to the n-th row to sequentially control the first control circuits30in the first row to the n-th row to be turned on. The light-emission signal interface L in the second control chip102is coupled to the first interface P1in the first control chip101, each light-emission signal interface L is coupled to one first control circuit30, and transmits the first light-emission signal EM1to the first control circuit30coupled thereto. For example, the light-emission signal interface L(m_n) is coupled to the first control circuit30in the n-th row and the m-th column, and the light-emission signal interface L(m_n) transmits the first light-emission signal corresponding to the light-emitting area S(m_n) in the n-th row and the m-th column to the first control circuit30in the n-th row and the m-th column.

In this basis, the first control circuit30is turned on under the control of the first light-emission signal EM1and the first enable signal PW1, and transmits the first power supply voltage signal V1to the first electrode of the light-emitting component20coupled thereto to cause the light-emitting component20to operate.

Moreover, the previous row of the first control circuits are turned off before the next row of the first control circuit is turned on. For example, after the first row of the first control circuits30are turned off, the second row of the first control circuits30are turned on; after the second row of the first control circuits30are turned off, the third row of the first control circuits30are turned on; and so on until the (n−1)th row of the first control circuit30are turned off, and the n-th row of the first control circuit30is turned on. In this case, light-emitting components20in the first row to the n-th row in the light-emitting substrate100operate row by row, which shortens the operating duration of each row of the light-emitting components20, and reduces a power consumption of the light-emitting substrate100.

In some embodiments, in a case where the plurality of first control circuits30in the light-emitting substrate100are arranged in the array, the transmitting, by the second control circuit40, the first enable signal PW1to each first control circuit30includes:

In a driving period, the second control circuit40simultaneously transmits the first enable signal PW1to each row of the first control circuits to control respective rows of the first control circuits to be turned on simultaneously, and each row of the first control circuits are turned off in the current driving period before each row of the first control circuits are turned on in the next driving period.

For example, referring toFIG. 17, the plurality of first control circuits30are arranged in n rows and m columns. In a driving period F (as shown inFIG. 20), the second control circuit40simultaneously transmits the first enable signal PW1to the first control circuits30from the first row to the n-th row, and controls each row of the first control circuits30to be turned on at the same time. Moreover, the second control circuit40transmits the first light-emission signal EM1to each first control circuit30. In this case, the first control circuit30is turned on under the control of the first enable signal PW1and the first light-emission signal EM1, and transmits the first power supply voltage signal V1from the first power supply voltage signal line LV1to the first electrode of the light-emitting component20in the light-emitting area S coupled to the first control circuit30so as to cause the light-emitting component20to operate.

For example, referring toFIG. 18, in a case where the light-emitting substrate100includes the first control chip101and the second control chip102, each enable signal interface E is coupled to a row of first control circuits30, a plurality of enable signal interfaces (E(1), E(2) . . . E(n−1), E(n)) of the second control chip102simultaneously transmit the first enable signals (PW1(1) . . . PW1(n)) to the first control circuits30in the first row to the n-th row to control the first control circuits30in the first row to the n-th row to be turned on at the same time. Each light-emission signal interface L in the second control chip102is coupled to one first control circuit30, and transmit the first light-emission signal EM1to the first control circuit30coupled thereto. The first control circuit30is turned on under the control of the first light-emission signal EM1and the first enable signal PW1, and transmits the first power supply voltage signal V1to the first electrode of the light-emitting component20coupled thereto to cause the light-emitting component20to operate.

In some embodiments, in a case where the plurality of first control circuits30in the light-emitting substrate100are arranged in the array, the transmitting, by the second control circuit40, the first enable signal PW1to each first control circuit30includes:

In a driving period, the second control circuit40sequentially transmits the first enable signal PW1to each row of the first control circuits to control respective rows of the first control circuits to be turned on sequentially, and each row of the first control circuits are turned off in the current driving period before each row of the first control circuits are turned on in the next driving period.

For example, referring toFIG. 17, the plurality of first control circuits30are arranged in n rows and m columns. In a driving period F (as shown inFIG. 21), the second control circuit40transmits the first enable signals (PW1(1) . . . PW1(n)) row by row to the first control circuits30from the first row to the n-th row, and controls each row of the first control circuits30to be turned on sequentially. Moreover, the second control circuit40transmits the first light-emission signal EM1to each first control circuit30, the first control circuit30is turned on under the control of the first enable signal PW1and the first light-emission signal EM1, and transmits the first power supply voltage signal V1from the first power supply voltage signal line LV1to the first electrode of the light-emitting component20in the light-emitting area S coupled to the first control circuit30to cause the light-emitting component20to operate.

For example, referring toFIG. 18, in a case where the light-emitting substrate100includes the second control chip102, each enable signal interface E is coupled to a row of first control circuits30, a plurality of enable signal interfaces (E(1), E(2) . . . E(n−1), E(n)) of the second control chip102sequentially transmit the first enable signals (PW1(1) . . . PW1(n)) to the first control circuits30in the first row to the n-th row to control the first control circuits30in the first row to the n-th row to be turned on sequentially. Each light-emission signal interface L in the second control chip102is coupled to a first control circuit30, and transmit the first light-emission signal EM1to the first control circuit30coupled thereto. The first control circuit30is turned on under the control of the first light-emission signal EM1and the first enable signal PW1, and transmits the first power supply voltage signal V1to the first electrode of the light-emitting component20coupled thereto to cause the light-emitting component20to operate.

In addition, each row of the first control circuits are turned off in the current driving period before the each row of the first control circuits are turned on in the next driving period. The first control circuits30in the first row to the n-th row are turned on sequentially, and the operating durations of the first control circuits30in the first row to the n-th row are the same.

In this basis, in a case where the light-emitting substrate100is applied to a liquid crystal display apparatus, in view of a certain time is required for a response of the liquid crystal molecules, each row of the first control circuits30is delayed to be turned on at the beginning of a driving period. For example, as shown inFIGS. 19, 20, and21, when the vertical frame synchronization signal Vsync in a driving period is active, the enable signal interface E(1) transmits the first enable signal to the first row of the first control circuits30coupled thereto, so that there is a first delay time t1for turning on the first row of the first control circuits30. Similarly, after the end of the driving period and at the beginning of a next driving period, there is a certain delay for turning off each row of the first control circuits30. For example, as shown inFIGS. 20 and 21, when the vertical frame synchronization signal Vsync in the next driving period is active, the enable signal interface E(1) transmits the first enable signal to the first row of the first control circuits30coupled thereto, so that there is a second delay time t2for turning off the first row of the first control circuit30.

In this case, a state of the liquid crystal molecule may be adjusted in the first delay time t1and the second delay time t2, so that the liquid crystal molecule is in a stable state when the light-emitting component20operates, which avoids a smearing problem on a displayed image due to unstable liquid crystal molecules when the light-emitting component20operates, and improves a display performance. In addition, a light-emitting duration of the light-emitting component20may be guaranteed, and loss of electro optic conversion efficiency may be reduced.

It will be noted that, as shown inFIGS. 19, 20 and 21, the first enable signal transmitted by the enable signal interface E(1) to the first row of the first control circuits30coupled thereto is represented by PW1(1), the first enable signal transmitted by the enable signal interface E(2) to the second row of the first control circuit30scoupled thereto is represented by PW1(2), and the first enable signal transmitted by the enable signal interface E(n) to the n-th row of the first control circuit30coupled thereto is represented by PW1(n). In addition, for convenience of description, the vertical frame synchronization signal received by the vertical frame synchronization signal interface Vsync is represented by Vsync, but the same reference number does not mean that the two are the same component.

In some embodiments, referring toFIG. 4, the first control circuit30includes the processor31, the analog-to-digital converter ADC and the first output sub-circuit32. In this case, the first control circuit30transmitting the first power supply voltage signal V1from the first power supply voltage signal line LV1to the first electrode of the light-emitting component20coupled to the first control circuit30according to the first light-emission signal EM1and the first enable signal PW1includes the following steps.

The processor31receives the first light-emission signal EM1and converts the format of the first light-emission signal EM1and generates the second light-emission signal EM2;

The analog-to-digital converter ADC receives the first enable signal PW1and generates the reference signal REF; and

The first output sub-circuit32transmits the first power supply voltage signal V1from the first power supply voltage signal line LV1to the first electrode of the light-emitting component20according to the second light-emission signal EM2and the reference signal REF.

In this case, the first output sub-circuit32is turned on under the control of the second light-emission signal EM2and the reference signal REF, and transmits the first power supply voltage signal V1to the first electrode of the light-emitting component20. Since the potentials of the second light-emission signals EM2generated by respective first control circuits30is not completely the same as the potentials of the reference signal REF generated, the operating time of the light-emitting component20may be controlled by adjusting the potential of the second light-emission signal EM2and controlling the duration for which the first power supply voltage signal V1is transmitted to the first electrode of the light-emitting component20by the first control circuit30, and the amplitude of the current flowing through the light-emitting component20is controlled by adjusting the potential of the reference signal REF.

In some embodiments, referring toFIG. 8, the second control circuit40includes the timing control sub-circuit41, the data processing sub-circuit42, the memory43and the amplifier sub-circuit44. In this case, the second control circuit40receiving the driving signal DRV, and transmitting the first light-emission signal EM1and the first enable signal PW1to each first control circuit30according to the driving signal DRV, includes the following steps:

The timing control sub-circuit41generates a clock signal;

The data processing sub-circuit42receives the driving signal DRV, outputs the second enable signal PW2according to the driving signal DRV and the clock signal from the timing control sub-circuit41, and transmits the first light-emission signal EM1to the plurality of first control circuits30.

The memory43stores the timing data and the light-emission current data for the preset light-emission mode.

The amplifier sub-circuit44amplifies the power of the second enable signal PW2from the data processing sub-circuit42according to the timing data and the light-emission current data for the preset light-emission mode from the memory43, generates the first enable signal PW1, and transmits the first enable signal PW1to the plurality of first control circuits30.

In this case, when the second control circuit40starts to operate, the timing control sub-circuit41generates the clock signal, and the data processing sub-circuit42transmits the first light-emission signal EM1to the plurality of first control circuits30according to the clock signal and the received driving signal DRV, and transmits the second enable signal PW2to the amplifier sub-circuit44. The amplifier sub-circuit44amplifies the power of the second enable signal PW2according to the timing data and the light-emission current data for the preset lighting mode stored in the memory43, generates the first enable signal PW1, transmits the first enable signal PW1to the plurality of first control circuits30, and controls the magnitude of the current of the first control circuit30to drive the plurality of first control circuits30to operate, so as to realize a control of a operation state of the light-emitting component20coupled to the first control circuit30.