CN112534493A

CN112534493A - Display device, electronic apparatus, and display driving method

Info

Publication number: CN112534493A
Application number: CN201880093836.7A
Authority: CN
Inventors: 郭星灵; 谭小平
Original assignee: Shenzhen Royole Technologies Co Ltd
Current assignee: Shenzhen Royole Technologies Co Ltd
Priority date: 2018-07-25
Filing date: 2018-07-25
Publication date: 2021-03-19
Also published as: WO2020019205A1

Abstract

The application discloses a display device, an electronic apparatus and a display driving method. The display device (100) includes a plurality of light emitting cells (2) arranged in an array, each row of the light emitting cells (2) being divided into at least two partitions (a1), the display driving method including the steps of: when the line scanning mode is used for controlling the line-by-line light emission of the light emitting units (2) in each line, the light emitting units (2) in different subareas in the same line are controlled to emit light at different light emitting starting times, wherein the light emitting starting times of the light emitting units (2) in the same subarea in the same line are the same. According to the invention, the light-emitting units in each row are partitioned, and the light-emitting time of different partitions is staggered, so that the number of the light-emitting units which are excited to emit light in the same time is reduced when the light-emitting units in each row emit light for display, and the coupling noise is effectively reduced.

Description

Display device, electronic apparatus, and display driving method

Technical Field

The present invention relates to a display technology, and more particularly, to a display device, an electronic apparatus, and a display driving method for the display device and the electronic apparatus.

Background

At present, display devices such as an OLED (Organic Light Emitting Diode) display screen are widely used. The AMOLED (Active Matrix Organic Light Emitting Diode) display device is the most commonly used type of OLED display device due to its high display performance and low power consumption. However, with the improvement of the resolution of the display screen, the current AMOLED display device needs to drive a large number of OLEDs in one driving, which results in large coupling noise (coupling noise), unnecessary power loss, and influences the stability of other electrical signals in the display device.

Disclosure of Invention

The embodiment of the invention discloses a display device, electronic equipment and a display driving method, which can effectively reduce coupling noise and power loss.

The embodiment of the invention discloses a display device which comprises a plurality of light-emitting units arranged in an array and a driving control circuit. Wherein each row of the light emitting cells is divided into at least two partitions. The driving control circuit is used for controlling the light-emitting units in each row to emit light line by line in a line scanning mode, and controlling the light-emitting units in the same row in different subareas to emit light at different light-emitting starting times, wherein the light-emitting starting times of the light-emitting units in the same subarea in the same row are the same.

The embodiment of the invention also discloses electronic equipment which comprises a display device, wherein the display device comprises a plurality of light-emitting units which are arranged in an array and a driving control circuit. Wherein each row of the light emitting cells is divided into at least two partitions. The driving control circuit is used for controlling the light-emitting units in each row to emit light line by line in a line scanning mode, and controlling the light-emitting units in the same row in different subareas to emit light at different light-emitting starting times, wherein the light-emitting starting times of the light-emitting units in the same subarea in the same row are the same.

The embodiment of the invention also discloses a display driving method, which is applied to a display device, wherein the display device comprises a plurality of light-emitting units which are arranged in an array, each row of light-emitting units is divided into at least two subareas, and the display driving method comprises the following steps: when the line scanning mode is used for controlling the line-by-line light emission of the light emitting units in each line, the light emitting units in the same line in different subareas are controlled to emit light at different light emitting starting times, wherein the light emitting starting times of the light emitting units in the same subarea of the same line are the same.

According to the display device, the electronic equipment and the display driving method, the light-emitting units in each row are partitioned, and the light-emitting time of different partitions is staggered, so that the number of the light-emitting units which are excited to emit light in the same time is reduced when the light-emitting units in each row emit light for display, and the coupling noise is effectively reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a block diagram of a display device according to an embodiment of the present application.

Fig. 2 is a schematic plan view illustrating each row partition of the display device according to an embodiment of the present application.

Fig. 3 is a schematic plan view of a display device according to another embodiment of the present application.

Fig. 4 is a schematic circuit diagram of a specific circuit structure of a driving control circuit of a display device according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of a light emitting unit in an embodiment of the present application.

FIG. 6 is a waveform diagram of a driving voltage according to an embodiment of the present application

Fig. 7 is a block diagram of a data driving circuit according to an embodiment of the present application.

Fig. 8 is a block diagram of a data driving circuit according to another embodiment of the present application.

Fig. 9 is a schematic diagram illustrating the effect of reducing coupling noise of the display device according to an embodiment of the present application compared to the prior art.

Fig. 10 is a block diagram of an electronic device according to an embodiment of the present application.

Fig. 11 is a flowchart illustrating a display driving method according to an embodiment of the present application.

Fig. 12 is a flowchart of a display driving method according to another embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and fig. 2 together, fig. 1 is a block diagram of a display device 100 according to an embodiment of the invention. Fig. 2 is a schematic plan view illustrating each row partition of the display device 100 according to an embodiment of the invention.

As shown in fig. 1 and fig. 2, the display device 100 includes a driving control circuit 1 and a plurality of light emitting units 2 arranged in an array. Each light emitting unit 2 may correspond to one pixel point forming the display device 100. The driving control circuit 1 is coupled to the light emitting units 2 arranged in an array.

The drive control circuit 1 controls the light emitting units 2 of each row to emit light row by row in a row scanning manner. Here, as shown in fig. 2, each row of the light emitting cells 2 of the display device 100 is divided into at least two partitions a 1. The driving control circuit 1 is used for controlling the light-emitting units 2 in different subareas A1 of the same row to emit light at different light-emitting starting times, wherein the light-emitting starting times of the light-emitting units 2 in the same subarea A1 of the same row are the same. Thereby, the number of the light emitting units 2 which are activated to start emitting light at the same time is reduced in each row in the light emitting display, and the coupling noise (coupling noises) is effectively reduced.

Wherein the driving control circuit 1 further controls the light emitting time of the light emitting cell 2 of each division a1 to last at least until after the light emitting start time of the light emitting cell 2 of the last light emitting division a1, so that there is an overlapping light emitting time of the light emitting cells 2 in the same row of different division a 1.

In some embodiments, the driving control circuit 1 controls the light emitting cells 2 in the same row in the different division a1 to stop emitting light at the same light emission end time later than the light emission start time of the light emitting cell 2 of the last light emitting division a 1. Therefore, the light-emitting units 2 in different partitions a1 in the same row have overlapping light-emitting time, and the light-emitting units 2 in different partitions a1 have different light-emitting start time for each row of light-emitting units 2, but eventually have overlapping light-emitting time, so that a complete row picture can be formed when the light-emitting units 2 in the same row emit light simultaneously.

In some embodiments, the time period from the light emission start time of the first division a1 to the light emission start time of the last division a1 to start light emission is significantly less than the time period in which all the divisions a1 emit light simultaneously. For example, assuming that the interval duration from the light emission start time of the first light-emitting partition a1 to the light emission start time of the last light-emitting partition a1 in each row is t0, the duration in which all the partitions a1 emit light simultaneously is t1, and t1 is more than twice as long as t0, from the perspective of human eye light sensing, the plurality of different partitions a1 in the same row still emit light simultaneously, which does not affect the visual perception of display, and at the same time, the light-emitting units 2 in the same row can be divided into a plurality of parts to emit light at different light emission start times, thereby reducing coupling noise.

After the light-emitting units 2 in the same row in different subareas a1 stop emitting light at the same light-emitting end time, the driving control circuit 1 controls the light-emitting units 2 in different subareas a1 in the next row to emit light at different light-emitting start times according to the subarea a1 divided by the next row until all rows are displayed completely to complete the display of one frame.

In some embodiments, each row of lighting units 2 of the display device 100 is logically pre-divided into at least two partitions a 1. In other embodiments, each row of the light emitting units 2 of the display device 100 may be physically divided into at least two partitions a1 in advance.

In some embodiments, as shown in fig. 2, each row of light-emitting units 2 is divided into a plurality of partitions a1, and the number and positions of the partitions a1 into which all the rows of light-emitting units 2 are divided correspond to one another. For example, as shown in fig. 2, each row of the light emitting cells 2 is divided into 5 partitions a1, and the positions of the partitions a1 in each row correspond to the same positions of the partitions a1 in the adjacent row.

Fig. 3 is a schematic plan view of a display device 100 according to another embodiment of the invention. As shown in fig. 3, in other embodiments, the display device 100 includes different numbers and/or positions of the partitions a1 into which the light-emitting units 2 of at least some of the rows of light-emitting units 2 are divided. For example, as shown in fig. 3, the light emitting cells 2 of the first row are divided into 4 partitions a1, the light emitting cells 2 of the second row are divided into 5 partitions a1, and the partitions a1 are located at different positions from the light emitting cells 2 of the first row; the light-emitting units 2 in the third row are further divided into 4 partitions a1, and the position of each partition a1 corresponds one-to-one to the position of each partition a1 of the light-emitting units 2 in the first row; the fourth row of light-emitting units 2 is further divided into 5 divisions a1, and so on.

Therefore, in the present application, it is only necessary to ensure that each row of light-emitting units 2 is divided into at least two partitions a1, and the number and/or positions of the partitions a1 into which the light-emitting units 2 of different rows are divided may be the same or different.

In some embodiments, the number of the light emitting units 2 included in different partitions a1 in the same row may be the same or different.

The number of the light emitting units 2 arranged in an array is determined by the resolution of the display device 100. For example, if the resolution of the display device 100 is 1920 rows by 1080 columns, the display device correspondingly includes 1920 rows by 1080 columns of the light-emitting units 2.

In the present application, the driving control circuit 1 may be located below the plurality of light emitting units 2 arranged in an array, the entire display device 100 has a multilayer structure, and fig. 1 is only for illustrating a schematic diagram of the driving control circuit 1.

Fig. 4 is a schematic diagram of a specific circuit structure of the driving control circuit 1 of the display device 100. Specifically, the driving control circuit 1 includes a scan driving circuit 11, a data driving circuit 12, a plurality of scan lines G, and a plurality of data lines D. The scan driving circuit 11 is electrically connected to each row of light emitting cells 2 through a plurality of scan lines G, and the data driving circuit 12 is electrically connected to each column of light emitting cells 2 through a plurality of data lines D.

The scan driving circuit 11 is configured to sequentially gate each row of the light emitting cells 2 by sequentially applying a scan signal to each row of the light emitting cells 2 through a scan line G, and the data driving circuit 12 is configured to determine the division a1 divided by the currently-gated row of the light emitting cells 2 and the light emitting cells 2 included in each division a1, and control the application of data signals to the light emitting cells 2 in different division a1 at different light emission start times through data lines D connected to the light emitting cells 2 of different division a1, so that the light emitting cells 2 in different division a1 emit light at different light emission start times. Wherein the data driving circuit 12 applies the data signal to the light emitting cell 2 of each division a1 previously emitting light at least until after the light emission start time of the light emitting cell 2 of the division a1 finally emitting light. Thus, as described above, the light-emitting units 2 in the different partitions a1 on the same row have overlapping light-emitting times, and the display of the complete row picture is realized.

For example, the data driving circuit 12 controls the application of the data signal to all the light emitting cells 2 in the first partition a1 of the current row to make all the light emitting cells 2 in the partition a1 perform corresponding display light emission, and then the data driving circuit 12 controls the application of the data signal to all the light emitting cells 2 in the second partition a1 of the current row to make all the light emitting cells 2 in the partition a1 perform corresponding display light emission while maintaining the application of the data signal to all the light emitting cells 2 in the first partition a 1; and then controls the application of the data signals to all the light emitting cells 2 in the third division a1 of the current row while maintaining the application of the data signals to all the light emitting cells 2 in the first division a1 and the second division a1, and so on.

Specifically, as shown in fig. 4, the driving control circuit 1 further includes a timing controller 13, the data driving circuit 12 further includes at least two data latches 121, each data latch 121 is electrically connected to the light emitting unit 2 in the corresponding partition a1 through a data line D, and each data latch 121 is configured to temporarily store a data signal to be applied to the light emitting unit 2.

The timing controller 13 is further coupled to the at least two data latches 121, and configured to apply a corresponding timing signal TP to the corresponding data latch 121 at a light emitting start time of a certain partition a1 of a certain row, so that the corresponding data latch 121 outputs a buffered data signal to the light emitting unit 2 of the corresponding partition a1 through the corresponding data line D, and controls the light emitting unit 2 of the corresponding partition a1 to emit light.

Accordingly, the data signals temporarily stored in at least two data latches 121 of the driving control circuit 1 can be sequentially and continuously applied to the light emitting cells of the corresponding partition a1 by the control of the timing controller 13, so that the light emitting cells 2 of different partitions a1 in the same row emit light at different light emitting start times.

In some embodiments, the timing controller 13 includes a plurality of pins, and the timing controller 13 is connected to different data latches 121 through different pins, and sends a timing signal TP to the corresponding data latch 121 through the corresponding pin at the light emitting start time of a certain partition a1, so that the corresponding data latch 121 outputs the temporarily stored data signal to the light emitting unit 2 of the corresponding partition a1, and controls the light emitting unit 2 of the corresponding partition a1 to emit light.

Fig. 5 is a schematic structural diagram of the light emitting unit 2. Each of the light emitting units 2 has the same structure, and as shown in fig. 5, a specific structure of one light emitting unit is illustrated for description. Each light-emitting unit 2 may include a light-emitting display device J1 and a pixel driving circuit 22, wherein the pixel driving circuit 22 is configured to drive the corresponding light-emitting display device J1 to emit light.

Each pixel driving circuit 22 includes a scan switch transistor T1 and a driving switch transistor T2. The drive control circuit 1 further includes a drive power supply 14.

As shown in fig. 5, the driving switch T2 of each light emitting unit 2 is electrically connected between the driving power supply 14, the scanning switch T1 of the same light emitting unit 2, and the positive terminal V + of the light emitting display device J1 of the same light emitting unit 2. The negative terminal V-of the light emitting display device J1 of each light emitting unit 2 is electrically connected to the ground point ELVSS.

The scan switch tube T1 of the light emitting unit 2 is also electrically connected to the scan driving circuit 11 through a corresponding scan line G.

When the scan driving circuit 11 outputs the scan signal G to the scan switch T1 of a row of light-emitting units 2 to control the scan switch T1 of the row of light-emitting units 2 to be turned on, the row of light-emitting units 2 is in the on state. At this time, for the light emitting units 2 in the row in the gate state, the data signal D output by the data driving circuit 12 can be transmitted to the driving switch tube T2 through the turned-on scanning switch tube T1, and the turned-on state and the turned-on degree of the driving switch tube T2 are controlled, that is, the driving switch tube T2 is turned on with a certain turned-on degree, so that the driving power supply 14 can apply the corresponding driving voltage ELVDD to the light emitting display device J1 and control the light emitting display device J1 to emit light correspondingly.

As shown in fig. 5, the driving switching tubes T2 of the light emitting units 2 in the same row are all electrically connected to the driving power supply 14, and the driving voltage ELVDD applied by the driving power supply 14 is a row voltage. The negative terminals V-of the light emitting display devices J1 of the light emitting units 5 in the same row are all electrically connected to the ground point ELVSS.

As shown in fig. 5, the timing controller 13 is further coupled to the driving power source 14, and is configured to control the driving power source 14 to output a corresponding driving voltage ELVDD.

Fig. 6 is a waveform diagram of the driving voltage ELVDD, which illustrates the overall waveform of the driving voltage ELVDD, the waveform applied to each partition a1, and the actual waveform of the driving power ELVDD after being affected after being applied to each partition a 1. In fig. 6, three partitions (1-partition, 2-partition, and 3-partition) are illustrated as an example.

In some embodiments, the timing controller 13 applies the timing signal TP to the corresponding data latch 121 at the light emitting start time of the first light emitting partition a1 (i.e., the 1-partition in fig. 6) of the currently strobed row to trigger the corresponding data latch 121 to output its temporarily stored data signal to the light emitting cell 2 of the corresponding partition a1, and also simultaneously generates the power-on trigger signal C1 to the driving power supply 14 to trigger the driving voltage ELVDD output by the driving power supply 14 to rise to the high level. Accordingly, when the data signal is applied to the first light-emitting partition a1 to turn on the driving switch transistor T2 of the light-emitting unit 2 in the partition a1, the driving power supply 14 connected to the driving switch transistor T2 also simultaneously applies the driving voltage ELVDD at a high level to the light-emitting display device J1 to control the light-emitting display device J1 to emit light correspondingly.

As shown in fig. 6, the driving power supply 14 continues to output the driving voltage ELVDD at a high level after receiving the power-on trigger signal C1. That is, the timing controller 13 outputs the power-on trigger signal C1 to the driving power supply 14 to trigger the driving power supply 14 to continuously output the driving voltage ELVDD at a high level. The timing controller 13 applies a timing signal TP to the corresponding data latch 121 at the light emitting start time of each partition a1 for subsequent light emission of the currently gated row to trigger the corresponding data latch to output the temporarily stored data signal to the light emitting unit 2 of the corresponding partition a1, so as to turn on the driving switch tube T2 in the light emitting unit 2 of the corresponding partition a1, and simultaneously, the driving voltage ELVDD of a high level continuously applied by the driving power supply 14 connected to the driving switch tube T2 is applied to the light emitting display device J1 through the driving switch tube T2 turned on in the light emitting unit 2 of the corresponding partition a1 to control the light emitting display device J1 in the light emitting unit 2 of the corresponding partition a1 to emit light correspondingly, so as to realize the light emission of the light emitting unit 2 of each partition a 1. In this manner, the light emitting display of the light emitting cells 2 in the respective partitions a1 is realized one by one.

In this embodiment, the timing signal TP and the power-on trigger signal C1 may be falling edge trigger signals.

When the driving switch T2 is turned on, the driving voltage ELVDD applied to the light emitting display device J1 is pulled low by the ELVSS at the other end of the light emitting display device J1 and is lower than the driving voltage ELVDD actually provided by the driving power supply 14. Specifically, the voltage difference between the driving voltage ELVDD and the ground point voltage ELVSS will become the sum of the turn-on voltage of the driving switching transistor T2 and the turn-on voltage of the light emitting display device J1, and since ELVSS is initially a zero voltage, the driving voltage ELVDD applied to the light emitting display device J1 will be pulled down by ELVSS at the other end of the light emitting display device J1.

Accordingly, ELVSS is also pulled high by ELVDD. As the light emitting section a1 is gradually increased, ELVSS is gradually pulled high, so that the driving voltage ELVDD applied to the light emitting display devices J1 in the light emitting units 2 of the plurality of sections a1 will also be gradually pulled high. Therefore, as shown in fig. 6, the ELVDD is gradually increased from the time when the first partition a1 starts emitting light, with the increase of the light-emitting partition a1, until the last partition a1 emits light, and maintains a fixed value.

In the present application, by means of the partition a1, the number of the driving voltage ELVDD and the ground point voltage ELVSS that are simultaneously pulled close to each other in each row of the light emitting units 2 is reduced, so that the coupling noise generated by the driving voltage ELVDD and the ground point voltage ELVSS that are pulled close to each other is reduced.

In some embodiments, the timing controller 13 is further configured to output an end signal E1 to all the data latches 121 and the driving power supply 14 at the light emitting end time, so as to trigger all the data latches 121 to stop outputting the data signal, and simultaneously trigger the driving voltage ELVDD output by the driving power supply 14 to become a low level.

As shown in fig. 6, the end signal E1 may be a rising edge trigger signal.

Accordingly, the driving switching tubes T2 of the light emitting cells 2 in all the partitions a1 currently strobed will be simultaneously turned off at the light emission end time while the driving power supply 14 transitions the driving voltage ELVDD from the high level to the low level. Thus, the light emission driving of the light emitting cells 2 of the current row is ended, and the driving of the light emitting cells 2 of the next row is prepared. Each line of light emitting units 2 realizes the display of a line picture by the driving method, and finally realizes the display of a complete picture frame.

As shown in fig. 6, the light emitting end time Te is later than the light emitting start time Ts of the last light emitting partition a1, so that, in the time period T1 from the light emitting start time Ts when the last light emitting partition a1 starts to emit light to the light emitting end time Te, the driving switching tubes T2 in the light emitting units 2 of all the partitions a1 are turned on under the driving of the corresponding data signals, and the driving power supply 14 drives the light emitting display devices J1 of all the partitions a1 of the current row to emit light at the same time by applying the high-level driving voltage ELVDD to the light emitting display devices J1 in the light emitting units 2 of all the partitions a1 through the turned-on driving switching tubes T2, thereby displaying the row picture.

As described previously, the time period t0 from the light emission start time of the first division a1 to the light emission start time of the last division a1 to start light emission is significantly shorter than the time period t1 in which all the divisions a1 emit light simultaneously. For example, assuming that the interval duration from the light emission start time of the first light-emitting partition a1 to the light emission start time of the last light-emitting partition a1 in each row is t0, the duration in which all the partitions a1 emit light simultaneously is t1, and t1 is more than twice as long as t0, from the perspective of human eye light sensing, the plurality of different partitions a1 in the same row still emit light simultaneously, which does not affect the visual perception of display, and at the same time, the light-emitting units 2 in the same row can be divided into a plurality of parts to emit light at different light emission start times, thereby reducing coupling noise.

Fig. 7 is a block diagram of the data driving circuit 12 according to an embodiment. As shown in fig. 7, the data driving circuit 12 includes a digital gamma controller (DGE) 122, a shift controller 123, a digital-to-analog converter 124, a gamma reference voltage generator 125, and a data source buffer 126, in addition to the at least two data latches 121. The at least two data latches 121 are connected in parallel between the digital gamma controller 122 and the shift controller 123, the digital-to-analog converter 124 and the data source buffer 126 are sequentially connected in series, and the gamma reference voltage generator 125 is electrically connected to the digital-to-analog converter 124 and is configured to provide a reference voltage for the digital-to-analog converter 124. The data source buffer 126 is electrically connected to the light emitting cells 2 of all the rows.

The digital gamma controller 122 is configured to read RGB data of each line of a picture to be displayed, and the RGB data read by the digital gamma controller 122 respectively transfers the RGB data corresponding to each partition a1 to the corresponding data latch 121 according to the partition a1 of the current line, so that the RGB data corresponding to different partitions a1 are temporarily stored in different data latches 121.

When a data latch 121 receives a timing signal TP from the timing controller 13, the data latch 121 sends the temporarily stored RGB data to the shift controller 123, and the RGB data is output to the digital-to-analog converter 124 through the shift controller 123, and is converted into an analog data signal by the digital-to-analog converter 124 and then output to the light emitting unit 2 of the corresponding partition a1 through the data source buffer 126, so that the driving switch T2 of the light emitting unit 2 of the corresponding partition a1 is driven to be turned on, and the driving power supply 14 can apply a high-level driving voltage ELVDD to the light emitting display device J1 through the driving switch T2 turned on in the light emitting unit 2 of the corresponding partition a1 to drive the light emitting display device J1 to emit light.

In some embodiments, when the number of the partitions a1 into which each row of the light emitting cells 2 is divided is the same, the number of the at least two data latches 121 may be the same as the number of the partitions a1 into which each row of the light emitting cells 2 is divided, and each data latch 121 is coupled to the light emitting cell 2 of each partition a1 in a one-to-one correspondence. That is, each data latch 121 is coupled to the light emitting unit 2 of each partition a1 through the shift controller 123, the digital-to-analog converter 124, and the data source buffer 126, respectively.

Fig. 8 is a block diagram of a data driving circuit 12 according to another embodiment. In other embodiments, when the number of the partitions a1 divided per row of the light emitting cells 2 is not the same, the number of the at least two data latches 121 is equal to or greater than the maximum number of the partitions a1 divided in all the rows of the light emitting cells 2. The data driving circuit 12 further includes two path switch modules M1, M2, wherein one path switch module M1 is connected between the at least two data latches 121 and the shift controller 123, and the other path switch module M2 is connected between the at least two data latches 121 and the digital gamma controller 122. The data driving circuit 12 may further include a controller 128. The path switch modules M1 and M2 may include a plurality of path switches.

The controller 128 is electrically connected to the two path switch modules M1, M2, and is used for controlling the switching of the path switches in the two path switch modules M1, M2.

The controller 128 is further configured to control the path switch modules M1, M2 to select the same number of data latches 121 as the number of the partitions a1 into which the lighting units 2 of the current row are divided to be correspondingly coupled to the lighting units 2 of each partition a1 one by one when the number of the partitions a1 into which the lighting units 2 of the current row are divided is smaller than the number of the data latches 121.

Specifically, the controller 128 controls the path switch module M1 to randomly select the same number of data latches 121 as the partition a1 into which the light emitting unit 2 in the current row is divided to be connected to the shift controller 123, and controls the path switch module M2 to establish connection between the data latches 121 currently connected to the shift controller 123 and the digital gamma controller 122. Accordingly, the same number of data latches 121 as the number of the partitions a1 into which the lighting unit 2 of the current row is divided are selected by the path switch module M1 and coupled to the lighting unit 2 of each partition a1 through the shift controller 123, the digital-to-analog converter 124, the data source buffer 126 and the lighting unit 2 of each partition a1, respectively.

The controller 128 may obtain information of the number of partitions into which each row of light emitting units 2 of the display device 100 is divided, the light emitting units 2 included in each partition, and the like in advance, and the controller 128 may be further coupled to the scan driving circuit 11 to know the row of the current scan gate.

Referring back to fig. 5, the scan switch tube T1 includes a first control terminal T11, a first conducting terminal T12 and a second conducting terminal T13, the driving switch tube T2 includes a second control terminal T21, a third conducting terminal T22 and a fourth conducting terminal T23, and the third conducting terminal T22 and the fourth conducting terminal T23 are respectively electrically connected between the driving power supply 14 and the positive terminal V + of the corresponding light emitting display device J1; the second pass terminal T13 of the scan switch transistor T1 is connected to the second control terminal T21 of the driving switch transistor T2, and the first control terminal T11 and the first pass terminal T12 of the scan switch transistor T1 are coupled to the corresponding data latches 121.

When the scan driving circuit 11 controls the first control terminal T11 of the scan switch T1 of the light emitting unit 2 outputting the scan signal G to a row of a certain partition a1, the scan switch T1 is turned on. When the corresponding data latch 121 outputs the data signal (RGB data) to the turned-on scan switch transistor T1, the data signal is applied to the second control terminal T21 of the driving switch transistor T2 through the turned-on scan switch transistor T1, so as to control the driving switch transistor T2 to be turned on to a corresponding degree. Meanwhile, the high-level driving voltage ELVDD output from the driving power supply 14 is applied to the positive terminal V + of the light emitting display device J1 through the turned-on driving switching tube T2 to drive light emission of the light emitting display device J1.

As shown in fig. 5, the driving unit 11 further includes a capacitor C1, two ends of the capacitor C1 are electrically connected between the second control terminal T21 and the third conducting terminal T22 of the driving switch tube T2, and the capacitor C2 temporarily maintains the voltage at the second control terminal T21 of the driving switch tube T2, so as to prevent the voltage at the second control terminal T21 of the driving switch tube T2 from drifting.

Specifically, the Light Emitting display device J1 includes at least one Organic Light Emitting Diode (OLED) D1. Only one organic light emitting diode D1 is illustrated in fig. 5, and it is apparent that in other embodiments, the light emitting display device J1 may include a plurality of organic light emitting diodes D1 connected in series or in parallel between the positive terminal V + and the negative terminal V-of the light emitting display device J1.

The scan switch transistor T1 and the drive switch transistor T2 are high-level conduction switch transistors, and may be MOS transistors or BJT transistors. The first control end T11 and the second control end T21 correspond to a gate of an MOS transistor or a base of a BJT gate diode, the first conduction end T12 and the third conduction end T22 correspond to a drain of the MOS transistor or a collector of the BJT triode, and the second conduction end T12 and the fourth conduction end T23 correspond to a source of the MOS transistor or an emitter of the BJT triode.

Fig. 9 is a schematic diagram illustrating the effect of reducing the coupling noise of the display device of the present application compared to the prior art.

As shown in fig. 9, in one frame, as described above, the driving voltage ELVDD output from the driving power supply 14 periodically becomes high level along with the line scanning, and the data latch 121 of the data driving circuit 12 also outputs a data signal of high level along with the gradual light emission of each partition a1 to turn on the driving switch T2 of the light emitting unit 2 corresponding to the partition a 1.

At this time, for the light emitting unit 2 of the current row, the driving voltage ELVDD and the voltage ELVSS of the ground point to which the negative terminal V-of the light emitting display device J1 of each light emitting unit 2 is connected will be pulled close to each other, i.e., the driving voltage ELVDD will be pulled low and the voltage ELVSS of the ground point will be pulled high, generating noise coupling.

As shown in fig. 9, the coupling noise N2 of the present application is significantly reduced compared to the coupling noise N1 generated by the conventional driving method.

In the application, through the staggered driving display of the display device 100 in the partition A1, the light emitting time of the OLEDs in different areas of the same row of the display device 100 is staggered, thereby the ELVDD & ELVSS in the same row apply the staggering to the charging of the OLEDs, the number of the driving switch tubes T2 in the same row of the display device 100 which are simultaneously opened is reduced, the coupling noise and the unnecessary power loss are reduced, the influence on the stability of other electric signals of the display device 100 is avoided, and the power stability of the display device 100 is favorably improved.

The display device 100 is an AMOLED (Active Matrix Organic Light Emitting Diode) display screen, a display panel, or the like.

Fig. 10 is a block diagram of an electronic device according to the present application. As shown in fig. 10, the electronic device 200 includes the display device 100.

The electronic device 200 may be a mobile phone, a tablet computer, a television, a display, or the like, which includes the display apparatus 100.

The aforementioned controller 128 may be a central processing unit, a microcontroller, a microprocessor, a single chip, a digital signal processor, etc. The latches, registers, etc. referred to in this application may be EPPROM (electrically erasable programmable memory), RAM (random access memory), etc.

In some embodiments, the division of the partition a1 of each row of light-emitting units 2 may be preset by the manufacturer before factory shipment, or may be set by the user through a menu option of the electronic device 200.

Please refer to fig. 11, which is a flowchart illustrating a display driving method according to an embodiment of the present application. The display driving method is used for driving the display device 100 to display. The display device 100 includes a plurality of rows of light emitting units 2, each row of light emitting units 2 being divided into at least two partitions. As shown in fig. 11, the display driving method may include the following steps.

When the light emitting cells 2 of each row are controlled to emit light row by row in a row scanning manner, the light emitting cells 2 of the same row in different division areas a1 are controlled to emit light at different light emission start times, wherein the light emission start times of the light emitting cells 2 in the same division area a1 of the same row are the same (S111).

In some embodiments, the display device 100 further includes a scan driving circuit 11 and a data driving circuit 12. The step S111 may specifically include: the scan driving circuit 11 sequentially applies a scan signal to each row of the light emitting cells 2 through the scan lines G to sequentially gate each row of the light emitting cells 2; the data driving circuit 12 determines the sub-area a1 into which the row of light emitting cells 2 currently strobed is divided and the light emitting cells 2 included in each sub-area a1, and controls the light emitting cells 2 in different sub-areas a1 to be irradiated with different light emitting start times by applying data signals to the light emitting cells 2 in different sub-areas a1 through the data lines D connected to the light emitting cells 2 of different sub-areas a 1.

In some embodiments, the display device 100 further includes a timing controller 13, the data driving circuit 12 further includes at least two data latches 121, each data latch 121 is electrically connected to the light emitting unit 2 in the corresponding partition a1 through a data line D, wherein each data latch 121 is used for temporarily storing a data signal to be applied to the light emitting unit 2, and the timing controller 13 is further coupled to both of the at least two data latches 121. The "the data driving circuit 12 determines the sub-area a1 divided from the currently-strobed row of light emitting cells 2 and the light emitting cells 2 included in each sub-area a1, and controls the application of the data signals to the light emitting cells 2 in the different sub-areas a1 through the data lines D connected to the light emitting cells 2 of the different sub-areas a1 at different light emission start times so that the light emitting cells 2 in the different sub-areas a1 emit light at different light emission start times" further includes: the timing controller 13 applies a corresponding timing signal TP to the corresponding data latch 121 at the light emitting start time of the corresponding partition a1 of the currently-gated row of light emitting cells 2, so that the corresponding data latch 121 outputs its temporarily stored data signal to the light emitting cell 2 of the corresponding partition a1 through the data line D connected to the corresponding partition a1, thereby controlling the light emitting cell 2 of the corresponding partition a1 to emit light.

In some embodiments, the driving control circuit 1 further includes a driving power supply 14, and each of the light emitting units 2 includes a pixel driving circuit 22 and a light emitting display device J1. Each pixel driving circuit 22 includes a scan switch transistor T1 and a driving switch transistor T2. The driving switch T2 of the light emitting unit 2 is electrically connected between the driving power supply 14, the scanning switch T1 of the same light emitting unit 2, and the positive terminal V + of the light emitting display device J1 of the same light emitting unit 2. The negative terminal V-of the light emitting display device J1 of the light emitting unit 2 is electrically connected to the ground potential point ELVSS. The "the timing controller 13 applies the corresponding timing signal TP to the corresponding data latch 121 at the light emitting start time of the corresponding partition a1 of the currently-strobed row of light emitting cells 2, so that the corresponding data latch 121 outputs the temporarily stored data signal to the light emitting cell 2 of the corresponding partition a1 through the data line D connected to the corresponding partition a1, and controls the light emitting cell 2 of the corresponding partition a1 to emit light" may further include: the timing controller 13 applies a timing signal TP to the corresponding data latch 121 at the light emitting start time of the first light-emitting partition a1 of the currently-gated row, and triggers the corresponding data latch 121 to output its temporarily stored data signal to the light-emitting unit 2 of the corresponding partition a1 and turn on the driving switch tube T2 in the light-emitting unit 2 of the partition a1, and also simultaneously generates a power-on trigger signal C1 to the driving power supply 14 to trigger the driving voltage ELVDD output by the driving power supply 14 to rise to a high level, so that the driving voltage ELVDD at the high level is applied to the positive terminal V + of the corresponding light-emitting display device J1 through the turned-on driving switch tube T1 to drive the corresponding light-emitting display device J1 to emit light; the timing controller 13 triggers the driving power supply 14 to continuously apply the high-level driving voltage ELVDD, and applies the timing signal TP to the corresponding data latch 121 at the light emitting start time of each partition a1 for subsequent light emission of the currently strobed row to trigger the corresponding data latch to output its temporarily stored data signal to the light emitting unit 2 of the corresponding partition a1, so as to turn on the driving switch T2 in the light emitting unit 2 of the corresponding partition a1, and at the same time, the high-level driving voltage ELVDD continuously applied by the driving power supply 14 is applied to the light emitting display device J1 through the driving switch T2 turned on in the light emitting unit 2 of the corresponding partition a1 to control the light emitting display device J1 in the light emitting unit 2 of the corresponding partition a1 to emit light, so as to realize the light emission of the light emitting unit 2 of each partition a 1.

In some embodiments, as shown in fig. 11, the display driving method further includes the steps of:

the light emitting time of the light emitting unit 2 of each division a1 is controlled to last at least until after the light emitting start time of the light emitting unit 2 of the division a1 which is the last to emit light, so that there are overlapping light emitting times of the light emitting units 2 within the same row of different divisions a1 (S112). In some embodiments, the step S112 may specifically include: the driving control circuit 1 controls the light emitting cells 2 in the same row in the different division a1 to stop emitting light at the same light emission end time later than the light emission start time of the light emitting cell 2 of the last light emitting division a 1.

In some embodiments, the time period from the light emission start time of the first division a1, which starts to emit light, to the light emission start time of the last division a1, which starts to emit light, is significantly less than the time period in which all the divisions a1 emit light simultaneously.

Please refer to fig. 12, which is a flowchart illustrating a display driving method according to another embodiment of the present application. The display driving method is used for driving the display device 100 to display. As shown in fig. 12, in another embodiment, the display driving method may include the following steps.

The display device 100 is divided into the divisional regions for each line of the display units 2 (S121). Specifically, the division of the partition a1 of each row of the light-emitting units 2 may be preset by the manufacturer before shipment, or may be set by the user through a menu option of the electronic device 200.

When the light emitting cells 2 of each row are controlled to emit light row by row in a row scanning manner, the light emitting cells 2 of the same row in different division areas a1 are controlled to emit light at different light emission start times, wherein the light emission start times of the light emitting cells 2 in the same division area a1 of the same row are the same (S122).

The light emitting time of the light emitting unit 2 of each division a1 is controlled to last at least until after the light emitting start time of the light emitting unit 2 of the division a1 which is the last to emit light, so that there are overlapping light emitting times of the light emitting units 2 within the same row of different divisions a1 (S123).

Steps S122 and S123 correspond to steps S111 and S112 in fig. 11, respectively, and more specific description can refer to the related description of steps S111 and S112.

The display driving method of fig. 11-12 and the function executed by the display device 100 may correspond to each other, and the method steps not mentioned in fig. 11-12 may further refer to the function steps executed by the display device 100.

Accordingly, in the display device 100, the electronic apparatus 200, and the display driving method according to the present application, the light-emitting units 2 in each row are divided and the light-emitting times of the different divisions are shifted, so that the number of light-emitting units 2 which are excited to emit light at the same time in the light-emitting display of the light-emitting units 2 in each row is reduced, thereby effectively reducing the coupling noise. In particular, in the present application, the display device 100 is partitioned into the partitions a1 for staggered driving display, so that the light emitting timings of the OLEDs in different areas in the same row of the display device 100 are staggered, thereby staggering the charging of the OLEDs by ELVDD & ELVSS in the same row, reducing the number of the driving switch tubes T2 in the same row of the display device 100 that are simultaneously turned on, reducing the coupling noise and the unnecessary power loss, avoiding affecting the stability of other electrical signals of the display device 100, and contributing to improving the power stability of the display device 100.

The display driving method provided herein may be implemented in hardware, firmware, or as software or computer code that may be stored in a computer readable storage medium such as a CD, ROM, RAM, floppy disk, hard disk, or magneto-optical disk, or as computer code that is originally stored on a remote recording medium or a non-transitory machine readable medium, downloaded over a network, and stored in a local recording medium, so that the method described herein may be presented using a general purpose computer or special processor, or as software stored on a recording medium in programmable or dedicated hardware such as an ASIC or FPGA. As can be appreciated in the art, a computer, processor, microprocessor, controller or programmable hardware includes memory components, e.g., RAM, ROM, flash memory, etc., which can store or receive software or computer code when accessed and executed by a computer, processor or hardware implementing the processing methods described herein. In addition, when a general-purpose computer accesses code for implementing the processing shown herein, execution of the code transforms the general-purpose computer into a special-purpose computer for performing the processing shown herein.

The computer readable storage medium may be a solid state memory, a memory card, an optical disc, etc. The computer readable storage medium stores program instructions for a computer to call and execute the display driving method shown in fig. 11 to 12.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

A display device, characterized in that the display device comprises;

the light-emitting units are arranged in an array, wherein each row of the light-emitting units is divided into at least two partitions;

and the driving control circuit is used for controlling the light-emitting units in each row to emit light line by line in a line scanning mode, and controlling the light-emitting units in the same row in different subareas to emit light at different light-emitting starting times, wherein the light-emitting starting times of the light-emitting units in the same subarea of the same row are the same.
The display device according to claim 1, wherein the drive control circuit is further configured to control the light emission time of the light emitting unit of each of the divisional areas to last at least until after the light emission start time of the light emitting unit of the last light emitting divisional area, so that there is an overlapping light emission time in the light emission time of the light emitting units in different divisional areas in the same row.
The display device according to claim 2, wherein the drive control circuit controls the light emitting cells in different divisional areas on the same row to stop emitting light at the same light emission end time later than the light emission start time of the light emitting cell of the last light emitting divisional area.
The display device according to claim 2, wherein a time period from a light emission start time of a first division area from which light emission starts to a light emission start time of a last division area from which light emission starts is shorter than a time period in which all the division areas emit light simultaneously.
The display device according to claim 2, wherein the driving control circuit includes a scan driving circuit, a data driving circuit, a plurality of scan lines and a plurality of data lines, the scan driving circuit is electrically connected to each row of the light emitting cells through the plurality of scan lines, the data driving circuit is electrically connected to each column of the light emitting cells through the plurality of data lines, the scan driving circuit is used for sequentially applying a scan signal to each row of light emitting cells through a scan line to sequentially gate each row of light emitting cells, the data driving circuit is for determining the divisional areas into which the currently-gated row of light emitting cells is divided and the light emitting cells included in each divisional area, and controls the application of data signals to the light emitting cells in different partitions at different light emission start times through data lines connected to the light emitting cells of different partitions, so that the light emitting units in different partitions emit light at different light emission start times.
The display device according to claim 5, wherein the data driving circuit further comprises at least two data latches, each data latch is electrically connected to the light emitting cells in the corresponding partition through a data line, each data latch is configured to temporarily store a data signal to be applied to the light emitting cell, the timing controller is further coupled to the at least two data latches, and the timing controller applies a corresponding timing signal to the corresponding data latch at a light emitting start time of a corresponding partition of a currently-strobed row of light emitting cells, so that the corresponding data latch outputs the temporarily stored data signal to the light emitting cell of the corresponding partition to control the light emitting cell of the corresponding partition to emit light.
The display apparatus according to claim 6, wherein the driving control circuit further comprises a driving power supply, each light emitting unit comprises a light emitting display device and a pixel driving circuit, the pixel driving circuit is used for driving the corresponding light emitting display device to emit light, each pixel driving circuit comprises a scan switch tube and a driving switch tube, the driving switch tube of each light emitting unit is electrically connected between the driving power supply, the scan switch tube of the same light emitting unit and the positive electrode terminal of the light emitting display device of the same light emitting unit, and the negative electrode terminal of the light emitting display device of each light emitting unit is electrically connected with a ground potential point.
The display device as claimed in claim 7, wherein when the scan driving circuit outputs the scan signal to the scan switching tubes of a row of the light emitting units to control the scan switching tubes of the row of the light emitting units to be turned on, the row of the light emitting units is in a gate state, and the data signal output by the data driving circuit can be transmitted to the driving switching tubes through the turned-on scan switching tubes to control the turn-on state and the turn-on degree of the driving switching tubes, so that the driving power source can apply a corresponding driving voltage to the light emitting display device to control the light emitting display device to emit light correspondingly.
The display apparatus according to claim 8, wherein the timing controller is further coupled to the driving power supply, and when the timing controller applies a timing signal to the corresponding data latch at a light emitting start time of a first light emitting partition of the currently strobed row to trigger the corresponding data latch to output its temporarily stored data signal to the light emitting unit of the corresponding partition, the timing controller also simultaneously generates a power-on trigger signal to the driving power supply to trigger the driving power supply to output a driving voltage rising to a high level, so that the driving voltage of the high level applied by the driving power supply is applied to the light emitting display device through the turned-on driving switch tube to drive the light emitting display device to correspondingly emit light.
The display device according to claim 1, wherein the division into which each row of light emitting units is divided is set before factory shipment or set by a user through a menu option.
The display device according to claim 10, wherein the number and/or positions of the partitions into which the light emitting cells of different rows are divided are the same or different.
An electronic device characterized in that it comprises a display device according to any one of claims 1-11.
A display driving method is applied to a display device, and is characterized in that the display device comprises a plurality of light-emitting units which are arranged in an array, each row of the light-emitting units is divided into at least two subareas, and the display driving method comprises the following steps:

when the line scanning mode is used for controlling the line-by-line light emission of the light emitting units in each line, the light emitting units in the same line in different subareas are controlled to emit light at different light emitting starting times, wherein the light emitting starting times of the light emitting units in the same subarea of the same line are the same.
The display driving method according to claim 13, wherein the display device 100 further comprises a scan driving circuit and a data driving circuit, and the controlling of the light emitting units in the same row in different partitions to emit light at different light emission start times while controlling the light emitting units in each row to emit light row by row in a row scanning manner, wherein the light emission start times of the light emitting units in the same partition in the same row are the same comprises:

the scanning driving circuit sequentially applies scanning signals to each row of light-emitting units through scanning lines to sequentially gate each row of light-emitting units;

the data driving circuit determines the divisional areas into which the row of light emitting cells currently strobed is divided and the light emitting cells included in each divisional area, and controls the light emitting cells in different divisional areas to emit light at different light emission start times by applying data signals to the light emitting cells in the different divisional areas at different light emission start times through data lines connected to the light emitting cells of the different divisional areas.
The display driving method of claim 14, wherein the display device further comprises a timing controller, the data driving circuit further comprises at least two data latches, each of the data latches is electrically connected to the light emitting cells in the corresponding partition through a data line, the data driving circuit determines the partition into which the row of light emitting cells currently being strobed is divided and the light emitting cells included in each partition, and controls the light emitting cells in different partitions to emit light at different light emission start times by applying data signals to the light emitting cells in different partitions through the data lines connected to the light emitting cells of different partitions, the light emitting cells in different partitions emitting light at different light emission start times, the data driving circuit further comprises:

the time sequence controller applies corresponding time sequence signals to the corresponding data latches at the light-emitting starting time of each subarea of the currently-gated row of the light-emitting units, so that the corresponding data latches output the temporarily-stored data signals to the light-emitting units of the corresponding subarea at the corresponding light-emitting starting time through the data lines connected with the light-emitting units of the corresponding subarea, and the light-emitting units of the corresponding subarea are controlled to emit light.
The display driving method according to claim 15, wherein the driving control circuit further includes a driving power supply, each of the light emitting units includes a pixel driving circuit and a light emitting display device, the pixel driving circuit includes a scan switching tube and a driving switching tube, the driving switching tube is electrically connected between the driving power supply, the scan switching tube of the same light emitting unit and a positive terminal V + of the light emitting display device of the same light emitting unit, a negative terminal of the light emitting display device is electrically connected to a ground potential point, the "timing controller applies a corresponding timing signal to a corresponding data latch at a light emitting start time of each partition of a currently strobed row of light emitting cells, and making a corresponding data latch output its temporarily stored data signal to the light emitting unit of the corresponding partition through the data line connected with the light emitting unit of the corresponding partition, and controlling the light emitting unit of the corresponding partition to emit light "further comprises:

the time sequence controller applies a time sequence signal to a corresponding data latch at the light-emitting initial time of the first light-emitting subarea of the currently gated row, triggers the corresponding data latch to output a temporarily-stored data signal to the light-emitting unit of the corresponding subarea and switches on the driving switch tube in the light-emitting unit in the subarea, and simultaneously generates an electrifying trigger signal to the driving power supply to trigger the driving voltage output by the driving power supply to rise to a high level so that the high-level driving voltage is applied to the positive electrode end of the corresponding light-emitting display device through the switched-on driving switch tube to drive the corresponding light-emitting display device to emit light;

the time schedule controller triggers the driving power supply to continuously apply high-level driving voltage, applies a time schedule signal to the corresponding data latch at the light-emitting initial time of each subarea of the subsequent light-emitting of the current gating row to trigger the corresponding data latch to output the temporarily stored data signal to the light-emitting unit of the corresponding subarea, and switches on the driving switch tube in the light-emitting unit of the corresponding subarea, and simultaneously, the high-level driving voltage continuously applied by the driving power supply is applied to the light-emitting display device through the switched-on driving switch tube in the light-emitting unit of the corresponding subarea to control the light-emitting display device in the light-emitting unit of the corresponding subarea to correspondingly emit light so as to realize the light-emitting of the light-emitting unit in each subarea.
The display driving method according to claim 13, further comprising:

and controlling the light-emitting time of the light-emitting unit of each subarea to at least last to be after the light-emitting starting time of the light-emitting unit of the last luminous subarea, so that the light-emitting time of the light-emitting units in different subareas in the same row has overlapped light-emitting time.
The display driving method according to claim 17, wherein the step of controlling the light emitting time of the light emitting cell of each division to last at least until the light emitting start time of the light emitting cell of the division which emits light last, so that there is an overlapped light emitting time of the light emitting cells in different divisions of the same row includes;

and controlling the light-emitting units in different subareas in the same row to stop emitting light at the same light-emitting end time, wherein the light-emitting end time is later than the light-emitting starting time of the light-emitting unit of the last luminous subarea.
The display driving method according to claim 13, further comprising: the method comprises the following steps:

and partitioning each row of display units of the display device.
The display driving method according to claim 19, wherein the number and/or positions of the divisional areas into which the light emitting cells of different rows are divided are the same or different.