CN116564235A

CN116564235A - Light emission control method and device, backlight panel, light emitting device and display

Info

Publication number: CN116564235A
Application number: CN202210109095.5A
Authority: CN
Inventors: 朱江; 张世雄; 周广荣
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2023-08-08

Abstract

The embodiment of the application discloses a light-emitting control method and a light-emitting control device, wherein the light-emitting device can provide direct backlight or direct display for a display, and the method can be used for controlling the LED array of the light-emitting device to emit light. The light emission control method may include: each LED unit is driven to emit light according to image data of a target image output by the display, and a time interval of the first area emitting light in the LED array is different from a time interval of the second area emitting light, wherein LEDs in the first area are distributed in each row and each column of the LED array, and the LED units in the second area are also distributed in each row and each column of the LED array, so that uniformity of lighting distribution in row direction and column direction of the LED array is improved, and flicker phenomenon of the display is reduced.

Description

Light emission control method and device, backlight panel, light emitting device and display

Technical Field

The present disclosure relates to the field of light emitting devices, and in particular, to a light emission control method and apparatus, a backlight panel, a light emitting device, and a display.

Background

The liquid crystal display is the most widely used flat panel display device at present by virtue of its high resolution, light weight, high color rendering, and the like. Light emitting devices in liquid crystal displays typically employ an array of light emitting diodes (light emitting diode, LEDs) as the light emitting devices to provide backlight for the liquid crystal panel.

In order to reduce light leakage and improve picture contrast, current light-emitting devices generally employ a dynamic dimming technique. The LED array in the light-emitting device is divided into N LED units (or LED partitions), and the brightness of the light emitted by the corresponding LED units is dynamically adjusted according to the image data corresponding to each LED unit, so that the backlight of a dark area in an image is reduced, light leakage is reduced, and the contrast of an output picture of the display is improved.

The LED array may provide a backlight for the liquid crystal panel, and may also display an image as a direct display by having each or more LED units emitting light as each pixel of the display.

In order to reduce the luminous energy consumption of the display, in the process of outputting images by the display, the luminous equipment alternately drives different rows of LED units in the LED array to emit light in a time-sharing way. However, the LED units located in different rows in the LED array are alternately turned on and off, so that the display is easy to flicker, and the viewing experience of a user on a display screen is reduced.

Disclosure of Invention

The embodiment of the application provides a light-emitting control method and device, a backlight lamp panel, light-emitting equipment and a display, which are used for reducing the light-emitting energy consumption of the light-emitting equipment in the display.

A first aspect of the present application provides a light emission control method applied to a light emitting device in a display, the light emitting device comprising an array of light emitting diodes, LEDs, the method comprising: and acquiring image data of a target image, wherein the target image is used for being output on the display, determining the luminous data of each LED unit in the LED array according to the image data, and driving the corresponding LED unit to emit light according to the luminous data of each LED unit. Wherein the lighting data of each LED unit indicates a time interval and a brightness value of the lighting of the corresponding LED unit. In this way, each LED unit in the LED array emits light according to the time interval and the brightness indicated by the corresponding light emission data, and thus, a proper backlight is provided for the corresponding image block in the target image.

Alternatively, the LED array may be an LED assembly in a light emitting device, including all LED units in the light emitting device. Alternatively, the LED array may correspond to a part of the LED units in the LED assembly, that is, the light emitting device may comprise other LED units than the LED array.

In one possible implementation, the time interval indicated by the light emission data of the first LED unit of the first area is different from the time interval indicated by the light emission data of the second LED unit of the second area, and each row and each column of the LED array simultaneously includes at least one of the first LED unit and at least one of the second LED unit, respectively. The first LED units and the second LED units which alternately emit light in a time-sharing mode are distributed on each row and each column of the LED array at the same time, so that uniformity of light-on and light-off distribution in the row direction and the column direction is improved, and flicker of a display is reduced.

In a possible implementation, the number of the first LED units and the number of the second LED units in any row of LED units or any column of LED units in the LED array are the same. In this way, the uniformity of the distribution of the first LED units and the second LED units which alternately emit light in a time-sharing manner in the LED array is further improved, and the flickering phenomenon of the display is reduced.

In one possible implementation, each m of the first LED units and each n of the second LED units in the LED array are alternately arranged along a row direction or a column direction of the LED array, and m and n are positive integers. In the process of light emission of the LED array, the light-emitting LED units and the non-light-emitting LED units are uniformly and alternately distributed in each row and each column, so that the uniformity of the on-off distribution in the LED array is improved, and the flicker phenomenon is reduced.

In one possible implementation, m is equal to n. Thus, the area of any one communication area formed by the first LED units is the same as that of the adjacent communication area formed by the second LED units, the uniformity of the on-off distribution in the LED array is further improved, and the flicker phenomenon is further reduced.

In a possible implementation manner, the target image is a frame of image in a target video, the target video is used for being output on the display, and the target video includes a motion block, before the driving the corresponding LED units to emit light according to the light emission data of each LED unit, the method further includes: and performing black insertion processing on the luminous data of a plurality of LED units in the LED array, wherein the plurality of LED units correspond to the motion track of the motion block in the target video. As the motion trail of the motion block in the target video is generally random, black insertion processing is carried out on the luminous data of the LED units corresponding to the motion trail, and the stripe-shaped flickering phenomenon seen by a user in the process of head up or head down watching of a display picture is reduced.

In one possible implementation, the motion trail is predicted from a first image and a second image that precede the target image in the target video, where the first image and the second image include the motion block. After the motion trail is determined according to two frames of images prior to the target image, black inserting processing can be carried out on the subsequent images (including the target image) in the target video according to the motion trail, and the black inserting position is not required to be determined once every two adjacent frames, so that the calculation resource is facilitated.

In one possible implementation manner, the black inserting process is performed on the light emitting data of the plurality of LED units in the LED array, and includes: and reducing the brightness value of a first time interval indicated by the light-emitting data of the LED unit corresponding to the first position, and reducing the brightness value of a second time interval indicated by the light-emitting data of the LED unit corresponding to the second position, wherein the first position and the second position are different positions of the motion block in the motion trail. And the black is alternately inserted at a plurality of positions of the motion block in the motion track in different black insertion time intervals, so that the black is inserted at the positions of the motion block in the target image and the front and rear frames of the target image on the premise of reducing flicker, and the tailing phenomenon of the motion block is reduced to a greater extent.

In one possible implementation, the sequence of the first time interval and the second time interval and the sequence of the first position and the second position in the motion trail are consistent.

Since the moving block is easily hatched at the position of the previous frame in the process of starting to display the target image, and the moving block is easily hatched at the position of the next frame in the process of starting to display the target image, that is, the change of the position requiring black insertion with time is also consistent with the moving track. Therefore, in the black inserting scheme provided by the embodiment of the application, the position of the black inserting LED unit in the LED array is consistent with the position to be black inserted along with the time, so that the tailing phenomenon of the motion block is reduced to a greater extent.

In the existing backlight panel, the first ends of all the LED units in the same row or the same column are connected to the same switch pin, and the switch pin can be used for receiving a switch signal for controlling the LEDs to be turned on or turned off, so that the time intervals of the light emission of all the LEDs in the same row or the same column are the same, and the LED units which alternately emit light in a time-sharing manner are difficult to realize to be distributed on each row and each column of the LED array at the same time, so that serious flickering phenomenon of the display is easy to occur.

A second aspect of the present application provides a backlight panel comprising a light emitting diode, LED, array, a plurality of switch pins and a plurality of drive pins, each of the switch pins and each of the drive pins being connected to a first end and a second end of one or more LED units in the LED array, respectively. The first switch pin is connected with first ends of a plurality of first LED units in the LED array, the second switch pin is connected with first ends of a plurality of second LED units in the LED array, at least one target row and at least one target column of the LED array respectively and simultaneously comprise at least one first LED unit and at least one second LED unit, and the first switch pin and the second switch pin are two different switch pins.

Alternatively, each switch pin may be used to input a switching signal, wherein the switching signal is used to control the LED unit to be turned on or off. Assuming that the switching signals received by the first switch pins are used for controlling the first LED units to emit light in a first time interval, and the switching signals received by the second switch pins are used for controlling the second LED units to emit light in a second time interval, as long as the first time interval and the second time interval are different, the first LED units and the second LED units can be distributed in each row and each column at the same time, and the uniformity of the on-off distribution in the row direction and the column direction is improved, so that the flickering phenomenon of the display is reduced.

Alternatively, each driving pin may be used to input a dimming signal, wherein the dimming signal is used to control a brightness value of the light emitted from the LED unit.

In one possible implementation, at least one of the driving pins is a shared driving pin, and each shared driving pin is connected to the second end of one of the first LED units and the second end of one of the second LED units at the same time. Because the first time interval of the light emission of the first LED unit and the second time interval of the light emission of the second LED unit can be different, the dimming signal received by one driving pin is beneficial to driving the first LED unit to emit light according to the brightness value indicated by the corresponding light emission data in the first time interval, and driving the second LED unit to emit light according to the brightness value indicated by the corresponding light emission data in the second time interval, on the premise of realizing dynamic dimming, the number of driving pins is reduced, and the wiring complexity is reduced.

In one possible implementation, m is equal to n. In the process of light emission of the LED array, the light-emitting LED units and the non-light-emitting LED units are uniformly and alternately distributed in each row and each column, so that the uniformity of the on-off distribution in the LED array is improved, and the flicker phenomenon is reduced.

Alternatively, the backlight panel provided in the second aspect of the embodiment of the present application may be a complete backlight panel of a light emitting device. Alternatively, the light emitting device may comprise one or more further backlight panels in addition to the backlight panels provided in the second aspect.

Alternatively, the LED array mentioned in the second aspect of the embodiment of the present application may include all LED units in the backlight panel provided in the second aspect of the embodiment of the present application. Alternatively, the backlight panel may include one or more other LED units in addition to the LED array.

A third aspect of the present application provides a light emission control apparatus applied to a light emitting device of a display, the light emitting device including an LED array, the light emission control apparatus including a control circuit, a first switch circuit, a second switch circuit, and a plurality of driving circuits. Each of the driving circuits is used for connecting with a second end of one or more LED units in the LED array. The first switch circuit is used for connecting first ends of a plurality of first LED units in the LED array, the second switch circuit is used for connecting a plurality of second LED units in the LED array, and at least one target row and at least one target column of the LED array respectively and simultaneously comprise at least one first LED unit and at least one second LED unit. The control circuit is used for controlling the first switching circuit to output a first switching signal, and the first switching signal is used for controlling the connected LED units to emit light in a first time interval. The control circuit is also used for controlling the second switching circuit to output a second switching signal, and the second switching signal is used for controlling the connected LED units to emit light in a second time interval. The control circuit is also used for controlling each driving circuit to output a dimming signal, and the dimming signal is used for controlling the brightness value of the connected LED units when the LED units emit light. In this way, on the premise of reducing the number of switching circuits in the light-emitting control device, the first LED units and the second LED units which alternately emit light in a time-sharing way are simultaneously distributed on each row and each column of the LED array, so that uniformity of on-off distribution in the row direction and the column direction is improved, and the flicker phenomenon of the display is reduced.

In one possible implementation, the number of the first LED units and the number of the second LED units in each of the target rows or each of the target columns are the same. In this way, the uniformity of the distribution of the first LED units and the second LED units which alternately emit light in a time-sharing manner in the LED array is further improved, and the flickering phenomenon of the display is reduced.

In one possible implementation, each m of the first LED units and each n of the second LED units in each of the target rows or each of the target columns are alternately arranged along a row direction or a column direction of the LED array, and m and n are positive integers. In the process of light emission of the LED array, the light-emitting LED units and the non-light-emitting LED units are uniformly and alternately distributed in each row and each column, so that the uniformity of the on-off distribution in the LED array is improved, and the flicker phenomenon is reduced.

In a possible implementation, at least one of the driving circuits is configured to connect the second end of one of the first LED units and the second end of one of the second LED units at the same time. The first time interval for the first LED unit to emit light and the second time interval for the second LED unit to emit light can be different, so that the driving circuit is beneficial to driving the first LED unit to emit light according to the brightness value indicated by the corresponding light emitting data in the first time interval, and driving the second LED unit to emit light according to the brightness value indicated by the corresponding light emitting data in the second time interval, and on the premise of realizing dynamic dimming, the number of the driving circuits is reduced, and the cost and the volume of the light emitting control module are reduced.

A fourth aspect of the present application provides a lighting control apparatus for a lighting device of a display, the lighting device comprising a light emitting diode, LED, array, the lighting control apparatus comprising a control module and a drive module. The control module is used for acquiring image data of a target image, and the target image is used for being output on the display. The control module is further configured to determine, according to the image data, light emission data of each LED unit in the LED array, where the light emission data of each LED unit indicates a time interval and a brightness value of light emission of the corresponding LED unit, and each row and each column of the LED array simultaneously includes at least one first LED unit and at least one second LED unit, respectively. The driving module is used for driving the corresponding LED units to emit light according to the light emitting data of each LED unit determined by the control module.

In a possible implementation manner, the time interval indicated by the light emitting data of the first LED unit of the first area is different from the time interval indicated by the light emitting data of the second LED unit of the second area in the LED array

In a possible implementation, the number of the first LED units and the number of the second LED units in any row of LED units or any column of LED units in the LED array are the same.

In one possible implementation, each m of the first LED units and each n of the second LED units in the LED array are alternately arranged along a row direction or a column direction of the LED array, and m and n are positive integers.

In one possible implementation, the target image is a frame of image in a target video, the target video is for output on the display, and the target video includes a motion block, the control module is further configured to: and before the corresponding LED units are driven to emit light according to the light emitting data of each LED unit, black inserting processing is carried out on the light emitting data of a plurality of LED units in the LED array, wherein the plurality of LED units correspond to the motion track of the motion block in the target video.

In one possible implementation, the motion trail is predicted from a first image and a second image that precede the target image in the target video, where the first image and the second image include the motion block.

In one possible implementation manner, the control module is specifically configured to: and reducing the brightness value of a first time interval indicated by the light-emitting data of the LED unit corresponding to the first position, and reducing the brightness value of a second time interval indicated by the light-emitting data of the LED unit corresponding to the second position, wherein the first position and the second position are different positions of the motion block in the motion trail.

A fifth aspect of the present application provides a light emitting device comprising an array of light emitting diodes, LEDs, and a light emission control apparatus as claimed in any one of claims 9 to 14.

In a possible implementation, the LED array is provided in a backlight panel as claimed in claim 7 or 8.

A sixth aspect of the present application provides a display comprising a light emitting device as provided in the fifth aspect.

A seventh aspect of the present application provides a computer storage medium having instructions stored therein that, when executed on a computing device (e.g., a control module), cause the computing device to perform the method of any of the above aspects.

An eighth aspect of the present application provides a computer program product comprising instructions which, when run on a computing device, cause the computing device to perform the method of any of the above aspects.

The technical effects caused by any one of the design manners of the fourth aspect to the eighth aspect may be referred to the technical effects caused by the corresponding design manners of the first aspect, the second aspect or the third aspect, and are not repeated herein.

Drawings

FIG. 1 illustrates one possible configuration of a display;

FIG. 2 illustrates one possible flow of a lighting control method according to an embodiment of the present application;

fig. 3 exemplarily shows one possible structure of a light emitting device according to an embodiment of the present application;

FIGS. 4-1 and 4-2 illustrate one possible on-off distribution of the LED array at t 1-t 2 and t 2-t 3, respectively;

fig. 5 schematically illustrates another possible structure of the light emitting device according to the embodiment of the present application;

fig. 6-1 exemplarily shows a switching signal input to SW1 by the switching circuit;

fig. 6-2 exemplarily shows a switching signal input to SW2 by the switching circuit;

fig. 6-3 schematically illustrate dimming signals output by the driving circuit;

FIGS. 7-1 and 7-2 illustrate another possible on-off distribution of the LED array at t 1-t 2 and t 2-t 3, respectively;

Fig. 8 schematically illustrates another possible structure of the light emitting device according to the embodiment of the present application;

fig. 9-1 to 9-3 respectively illustrate pictures corresponding to a video frame N-1, a video frame N and a video frame n+1 in the target video output by the display;

FIGS. 10-1 and 10-2 show one possible distribution of black inserted LED units of the LED arrays at t 1-t 2 and t 2-t 3, respectively;

fig. 11-1 to 11-3 show another possible distribution of black inserted LED units corresponding to t1 to t2 and t2 to t3 in the LED array, respectively.

Detailed Description

The embodiment of the application provides a method and a device for controlling light emission, and the light emitting device can be used for providing backlight or direct display for a display.

The application scene of the display is not limited by the embodiment of the application. For example, the display may be used as an output of a terminal or server. Alternatively, the display may be integrated in the terminal or the server. Alternatively, the display may be provided independently of the terminal or server and communicatively coupled to the terminal or server via wired or wireless means.

The structure of the display is described by way of example below.

Fig. 1 illustrates one possible configuration of a display. The display may include a liquid crystal device and a light emitting device, and referring to fig. 1, the liquid crystal device may include a liquid crystal layer and a liquid crystal control means, and the light emitting device may include a light emitting diode (light emitting diode, LED) assembly and a light emission control means. The liquid crystal layer is connected with the liquid crystal control device, and the LED component is connected with the light-emitting control device. The liquid crystal control device is used for acquiring a frame of image (called a target image) to be displayed on the display, and sending a driving signal to the liquid crystal layer according to the target image so as to drive the liquid crystal molecules to rotate. The light-emitting control device is used for sending a driving signal to the LED assembly to drive the LED assembly to emit light, so that direct type backlight is provided for the liquid crystal layer.

Fig. 1 is a schematic view of a display, and is not intended to limit the structure of the display. Alternatively, the display according to the embodiments of the present application may not include a liquid crystal device, and the light emitting device provides direct display for the display, that is, uses one or more light emitting LED units as each pixel of the display, so as to display an image. The display corresponding to fig. 1 may include further structures, for example, the display may also include an interface module that may be used to obtain a target image from other devices. Alternatively, the display corresponding to fig. 1 may comprise fewer structures, e.g. the liquid crystal control means and the light emission control means may be integrated together.

In the embodiment of the application, optionally, one LED unit may correspond to one or more pixels. Alternatively, one pixel may correspond to a plurality of LED units.

The embodiments of the present application do not limit the color of the light emitted by the LEDs in the LED assembly. Alternatively, the LED assembly may be a single-color LED assembly, where all LED units in the LED assembly emit light in the same color. Alternatively, the LED assembly may be a dual primary LED assembly or a full color LED assembly.

The embodiments of the present application do not limit the size of the LEDs in the LED assembly. Alternatively, the LEDs in the LED assembly may be mini (mini) LEDs, which generally refer to LEDs on the order of 100 microns, or micro (micro) LEDs, which generally refer to LEDs on the order of 50 microns.

The LED assemblies referred to in embodiments of the present application may comprise a plurality of LED units, optionally each LED unit may comprise one or more LEDs. In the LED assembly shown in fig. 1, each rectangle represents one LED unit. Referring to fig. 1, the LED assembly includes 12 rows and 5 columns of LED units, i.e., 60 LED units. For convenience of description, the LED units of the ith row and the jth column in the LED assembly may be referred to as LED units ij, where the ith row and the jth column are any one row and any one column in the LED array.

The LED assembly of fig. 1 of the embodiment of the present application is exemplified by a 12×5 rectangular array, and the size or shape of the LED assembly is not limited. Alternatively, the LED assembly may include more or fewer LED units. Alternatively, the LED assembly may be an array of other shapes, for example, the LED assembly may be a square array or a circular array, etc.

In order to improve the contrast of the output screen of the display, referring to fig. 2, an embodiment of the present application provides a light emission control method, which may be used to drive the LED array in the light emitting device to emit light. Alternatively, the light emitting device may be applied to a display, which may be, for example, the display corresponding to fig. 1. The LED array may for example be the LED assembly described hereinbefore or correspond to part of the LED units in the LED assembly, that is to say the LED assembly in the light emitting device may comprise an LED array and other LED units than an LED array.

Referring to fig. 2, the light emission control method of the embodiment of the present application may include steps S201 to S203.

S201, acquiring image data of a target image;

the target image may refer to a picture for output in a display or a frame of image (or video frame) in a video for output in a display. In one possible implementation, the pictures or video may be stored in a data format. Optionally, the pictures are stored in an image format including, but not limited to, a portable network graphics (portable network graphics, PNG) format or a graphics interchange file (drawing exchange file, DXF) format or a joint photographic experts group (joint photographic experts group, JPEG) format. Alternatively, the video may be stored in a video format including, but not limited to, an audio video interleave (audio video interleaved, AVI) format or a moving picture experts group (moving picture experts group, MPEG) format.

In one possible implementation, the target image includes pixel values corresponding to a plurality of pixels. Alternatively, the pixel value corresponding to each pixel in the target image may be red-green-blue (RGB) information or a gray value of the corresponding pixel.

The image data of the target image may refer to the target image, or may refer to data obtained by preprocessing the target image. Alternatively, if each LED unit in the LED array corresponds to a plurality of pixels in the target image, the image data of the target image may include the compressed target image. The embodiment of the application is not limited to a compression manner, as long as the compressed target image can indicate a statistic value of pixel values of the image block corresponding to each LED unit in the LED array. Alternatively, the statistic may be a mean value of pixel values of all pixels in the image block.

Alternatively, the image data of the target image may include time information of the target image in addition to the target image or the preprocessed target image, and the time information of the target image may indicate a time interval (referred to as a target time interval) in which the target image is output on the display. In this way, the lighting control device advantageously determines the time interval for providing backlight for the target image.

After the display acquires the target image to be output, the light emission control device may acquire image data of the target image. Referring to fig. 1, after the display acquires the target image, the target image may be buffered in the liquid crystal control device, and the light emission control device may acquire image data of the target image from the liquid crystal control device. The manner in which the light emission control device shown in fig. 1 acquires the target image is merely by way of example, and the embodiment of the present application is not limited to a specific manner in which the light emission control device acquires the image data of the target image. As an example, after the display acquires the target image, the target image may be buffered in the light emission control device, and the liquid crystal control device may acquire the target image from the light emission control device. Alternatively, as an example, after the display acquires the target image, the target image may be buffered in the liquid crystal control device and the light emission control device, respectively.

S202, determining luminous data of each LED unit in the LED array according to a target image;

after the light emission control device acquires the image data of the target image, the light emission data of each LED unit in the LED array can be determined according to the image data of the target image.

The emission data of different LED units in the LED array may be different. The embodiment of the application does not limit the rule of dividing the LED units in the LED array by the light-emitting control device, so long as different LED units can emit light according to different light-emitting data. Alternatively, one LED unit may include one or more LEDs, and the number of LEDs in one LED unit is not limited in the embodiments of the present application. If one LED unit includes a plurality of LEDs, the light emission data of all LEDs in the same LED unit may be the same, and the light emission data of the LED unit may be the light emission data of each LED in the LED unit.

The embodiment of the application does not limit the method for determining the light emitting data of the LED unit by the light emitting control device. Alternatively, if each LED unit corresponds to one pixel in the target image, the light emission control device may determine the light emission data of the LED unit according to the pixel value of the corresponding pixel in the target image. Optionally, if each LED unit corresponds to a plurality of pixels in the target image, the light emission control device may determine the light emission data of the LED unit according to the statistical value of the pixel values of the image block corresponding to the LED unit in the target image.

The light emission data for each LED unit in the LED array may indicate, but is not limited to, a time interval and a brightness value indicating that the corresponding LED unit is emitting light. For simplicity of description, the "time interval indicated by the light emission data of the LED unit" referred to in the embodiments of the present application refers to the "time interval in which the corresponding LED unit emits light indicated by the light emission data of the LED unit", and the "luminance value indicated by the light emission data of the LED unit" refers to the "luminance value of the LED unit in the time interval indicated by the light emission data thereof".

Assuming that the liquid crystal control device drives the liquid crystal molecules in the liquid crystal layer to deflect according to the target image in the target time interval, in order to provide backlight adapted to the target image, the time interval indicated by the light emission data of each LED unit determined in step S202 may be located in the target time interval.

The time interval indicated by the light emission data of the LED units may include one or more time intervals, and each time interval may be one continuous time interval. Taking the backlight scanning technique as an example, during the process of outputting the target image by the display, each LED unit may undergo a plurality of "on-off" processes, and accordingly, the light emission data of each LED unit may indicate a plurality of time intervals. By way of example, the time interval and the luminance value indicated by the light emission data of a certain LED unit (referred to as LED ij) may be as shown in table 1. Where t1, t2, t3, t4, t5 and t6 represent a plurality of moments arranged from first to last, and L1 represents a determined luminance value. Table 1 takes an example in which the light emission data indicates one luminance value, alternatively, the light emission data of the LED unit may indicate a plurality of luminance values, and may indicate a time interval corresponding to each luminance value.

TABLE 1

Time interval	Brightness value
		t1～t2	L1
t3～t4	L1
		t5～t6	L1

The embodiment of the present application is not limited to a specific form of the light emission data, as long as the light emission data can be used to determine a time interval and a luminance value of the LED light emission. Alternatively, the light emission data may be a parameter of a driving signal outputted from the light emission control device.

S203, driving the corresponding LED units to emit light according to the light emitting data of each LED unit;

after the light-emitting control device determines the light-emitting data of each LED unit, the corresponding LED unit can be driven to emit light according to the light-emitting data of each LED unit. In this way, each LED unit is facilitated to emit light according to the time interval and the brightness indicated by the corresponding light emission data, so as to provide a proper backlight for the corresponding image block in the target image.

Continuing to take the time interval and the brightness value indicated by the light emitting data of the LED ij as examples in table 1, the process of driving the LED ij to emit light by the light emitting control device is described. The light emission control device can drive the LED ij to emit light at t1 to t2, the light emission brightness is L1, and the LED ij is not driven to emit light at t2 to t 3. Then, the LED ij is driven to emit light at t3 to t4, the light-emitting brightness is L1, and the LED ij is not driven to emit light at t4 to t 5. The LED ij is then driven to emit light at t5 to t6, and the light emission luminance is L1.

The embodiment corresponding to fig. 2 can determine the light emitting data of each LED unit according to the displayed picture, and drive the corresponding LED unit to emit light according to the light emitting data of each LED unit, which is beneficial to dynamically adjusting the backlight brightness according to the image output by the display, reducing the backlight of dark areas in the picture, reducing the backlight power consumption, reducing the light leakage and improving the picture contrast.

Alternatively, in the embodiment of the present application, the light emission control device drives the corresponding LED unit to emit light according to the light emission data of each LED unit, which may be understood that the light emission control device sends a driving signal to the corresponding LED unit according to the light emission data of each LED unit. Therefore, if the luminance value indicated by the light emission data of the LED unit is less than or equal to 0, the light emission control module may not emit light after inputting a driving signal thereto according to the light emission data thereof. That is, in the embodiment of the present application, the LED unit emits light according to the time interval and the luminance value indicated by the corresponding light emission data includes a case where the LED unit does not emit light actually.

Fig. 1 shows the electrical connection between the light emitting control device and the LED in the LED assembly in a simplified manner by using a straight line connection between the light emitting control device and the LED assembly, but not specifically limiting the connection mode between the light emitting control device and the LED assembly. In order to drive all LEDs in the LED assembly to emit light, the light emission control device may be electrically connected to all LEDs in the LED assembly.

Another possible structure of the light emitting device is described below in connection with fig. 3.

Referring to fig. 3, the light emitting apparatus may include a light emission control device and a backlight panel. The light emitting control device may include a control module and a driving module, the control module being connected to the driving module. The backlight panel includes an LED assembly and a plurality of pins.

The backlight panel corresponding to fig. 3 may be a complete backlight panel of the light emitting device, or the light emitting device may further include one or more other backlight panels in addition to the backlight panel corresponding to fig. 3. Fig. 3 is a schematic diagram illustrating, by way of example and not limitation, one possible configuration of the backlight panel corresponding to fig. 3.

The LED assembly may include an LED array. Alternatively, the LED array is equivalent to the LED assembly. Alternatively, the LED assembly may comprise, in addition to the LED array, other LED units than the LED array. Assuming that the corresponding LED assembly of fig. 3 is a 12 x 5 rectangular array as shown in fig. 1, the 6 x 5 rectangular LED array shown in fig. 3 can be understood as half of the LED assembly. The LED array may correspond to a plurality of LED units arranged in succession in the LED assembly, or, alternatively, two adjacent LED units in the LED array may not be adjacent in the LED assembly.

Fig. 3 illustrates pins (SW 1 to SWp and D1 to Dq) for connecting an LED array among a plurality of pins, each pin connecting one or more LED units of the LED array, wherein p and q are positive integers. The driving module is respectively connected with a plurality of pins so as to be connected with each LED unit.

The control module may be used to perform step S201 and step S202, and the driving module may be used to input a driving signal to the corresponding LED unit according to the light emission data of each LED unit determined by the control module. Optionally, the driving signal input by the driving module to each LED unit is used to drive the corresponding LED unit to emit light according to the time interval and the brightness value indicated by the corresponding light emission data. Each LED unit in the LED array may emit light under control of the driving signal after receiving the driving signal.

Fig. 3 shows an exemplary possible configuration of the drive module. Referring to fig. 3, the driving module may include a plurality of switching circuits and a plurality of driving circuits. The switching circuit is used for outputting a switching signal, and the switching signal is used for controlling the LED unit to be turned on or turned off (or to emit light or not). The driving circuit is used for outputting a dimming signal, and the dimming signal is used for controlling the brightness value of the light emitted by the LED unit. Alternatively, the driving signal output to the LED unit by the driving module described above may include a switching signal and a dimming signal output thereto.

Each switching circuit is used for connecting a first end of one or more LED units, and each driving circuit is used for connecting a second end of one or more LED units. Wherein the first and second ends of the LED unit may correspond to an anode and a cathode of the LED, respectively, or the first and second ends of the LED unit may correspond to a cathode and an anode of the LED, respectively.

For convenience of description, the embodiment of the present application refers to a pin connected to a first end of the LED unit as a switch pin, and a pin connected to a second end of the LED unit as a driving pin. Assuming that each pin of SW1 to SWp is connected to the first terminal of the LED unit and each pin of D1 to Dq is connected to the second terminal of the LED unit, each pin of SW1 to SWp is used to connect to one switching circuit and each pin of D1 to Dq is used to connect to one driving circuit.

Fig. 3 illustrates an example in which each switching circuit is connected to one switching pin, alternatively, the switching circuit may be connected to one or more switching pins. Similarly, fig. 3 illustrates one drive pin connected to each drive circuit, alternatively, one or more drive pins may be connected to the drive circuit.

The high power consumption of the backlight and the tailing phenomenon of the moving block are two problems which are urgently needed to be solved by the light emitting device of the display. Next, a technical solution for solving these two problems is continuously provided based on the corresponding embodiment of fig. 2.

1. Technical scheme for reducing backlight power consumption

In the process of outputting images by the display, the light-emitting control device can divide the LED array into a plurality of areas and reduce power consumption by alternately driving the areas to emit light in a time-sharing manner. Alternatively, since the LED units in different regions emit light in different time intervals, any two LED units in different regions may multiplex the same driving circuit in the driving module in order to reduce the number of driving circuits. If the light emitting time intervals of the LED units in the same area are the same, all or part of the LED units in the same area may multiplex the same switching circuit in the driving module in order to reduce the number of switching circuits.

Two possible types of region division methods are described below by way of example, and the possible implementation of step S202 is further described in connection with a specific region division method, and the possible implementation of step S203 is further described by way of possible structures of the light emitting device.

First type of region division mode: the plurality of regions includes a region a in which the LED units a are located in odd-numbered rows and a region b in which the LED units b are located in even-numbered rows.

For convenience of description, each LED unit in the region a will be referred to as an LED unit a and each LED unit in the region b will be referred to as an LED unit b. Fig. 4-1 and 4-2 illustrate the on-off distribution of the LED array at t1 to t2 and t2 to t3, respectively, in the first type of area division. In fig. 4-1 and 4-2, white filled rectangles represent light emitting (i.e., bright) LED units, and black filled rectangles represent non-light emitting (i.e., dead) LED units.

In order to implement the first type of area division, the light emission control device determines in step S202 that the time interval indicated by the light emission data (shown in table 1) of the LED unit a is different from the time interval indicated by the light emission data (shown in table 2) of the LED unit b. The two time intervals being different means that the two time intervals do not include an intersection. Optionally, the time intervals indicated by the light emission data of all the LED units a determined by the light emission control device are the same, and the time intervals indicated by the light emission data of all the LED units b determined by the light emission control device are the same. t7 represents a time instant after t6, L2 represents a determined luminance value. L1 and L2 may be the same, or L1 and L2 may be different.

TABLE 2

Time interval	Brightness value
		t2～t3	L2
t4～t5	L2
		t6～t7	L2

To achieve the first type of region division, fig. 5 illustrates another possible structure of the light emitting device.

In the light emitting device shown in fig. 5, the light emitting control device and the backlight panel may be understood by referring to the corresponding content in the embodiment corresponding to fig. 3, and will not be described herein. Unlike fig. 3, in the light emitting device shown in fig. 5, in order to reduce the number of driving circuits each for connecting one LED unit a and one LED unit b, the switching circuit 1 for connecting all LED units a, and the switching circuit 2 for connecting all LED units b. Also, in order to reduce the number of driving pins and switching pins, each driving pin is connected to the cathode (i.e., the second terminal) of one LED unit a and the cathode (i.e., the second terminal) of one LED unit b, the switching pin 1 is connected to the anodes (i.e., the first terminals) of all LED units a, and the switching pin 2 is connected to the anodes (i.e., the first terminals) of all LED units b.

After the control module performs step S201 and step S202, the light emission data of each LED unit may be determined. Assume that the light emission data of the LED unit a determined by the control module is as shown in table 1 and the light emission data of the LED unit b determined by the control module is as shown in table 2. The following describes the specific implementation procedure of step S203 by way of example with reference to fig. 5.

The control module may control the switching circuit 1 to input a switching signal shown in fig. 6-1, for example, to SW1 according to the light emission data of the LED unit a. Assuming that the working voltage of the LEDs in the LED array is 3V to 4V, and the voltage range output by the driving circuit is 2V to 3V, the switching signal output by the switching circuit 1 under the control of the control module is used to control the connected LED units to emit light in the time interval indicated in table 1, and not emit light in other time intervals.

The control module may control the switching circuit 2 to input a switching signal, for example, as shown in fig. 6-2, to SW2 according to the light emitting data of the LED unit b. Assuming that the operating voltage of the LEDs in the LED array is 3V to 4V, the voltage range output by the driving circuit is 2V to 3V, so that the switching signal output by the switching circuit 2 under the control of the control module is used to control the connected LED units to emit light in the time interval indicated in table 2, and not emit light in other time intervals.

The control module may control the corresponding driving circuit to input a dimming signal as shown in fig. 6-3, for example, according to the light emitting data of each LED unit. Assuming that the LEDs in the LED array have a luminance of L1 under the driving of 10mA current and a luminance of L2 under the driving of 20mA current, since each driving circuit is connected to one LED unit a and one LED unit b, the dimming signal outputted by the driving circuit under the control of the control module is used to control the connected and turned-on LED units (i.e., LED units a) to emit light according to L1 during the time interval indicated in table 1 and the connected and turned-on LED units (i.e., LED units b) to emit light according to L2 during the time interval indicated in table 2.

Fig. 5 illustrates only the first and second rows of LED units, and other odd rows of LED units may be connected to SW1 and other even rows of LED units may be connected to SW2. Therefore, the odd-numbered LED units emit light in the time intervals indicated in table 1, do not emit light in other time intervals, and the even-numbered LED units emit light in the time intervals indicated in table 2, and do not emit light in other time intervals. Since the time intervals indicated in tables 1 and 2 are different, the on-off distribution of the LED units in the LED array alternately repeats the on-off distribution shown in fig. 4-1 and 4-2, and a flicker phenomenon easily occurs.

The second type of region division mode: the plurality of regions comprise a first region and a second region, and the first LED units in the first region and the second LED units in the second region are respectively and simultaneously distributed in each row and each column.

Applicants have found that by improving the uniformity of the distribution of the plurality of LED areas in an LED array that alternately emit light, it is advantageous to mitigate the flicker problem of the display. In order to improve the uniformity of the distribution of the plurality of regions in the LED array, the applicant proposes that the LED array may be divided into at least two regions (referred to as a first region and a second region, respectively) that alternately emit light in a time-sharing manner, and that the first region and the second region are distributed in each row and each column of the LED array.

For convenience of description, the present embodiment refers to each LED unit in the first region as a first LED unit, and each LED unit in the second region as a second LED unit. The first region may include a plurality of first LED units, the second region may include a plurality of second LED units, and the first LED units in the first region and the second LED units in the second region are simultaneously distributed in each row and each column, respectively. The multiple regions may also be other regions than the first region and the second region (e.g., the third region), and the embodiments of the present application do not limit the distribution of the LED units in the third region in the LED array. Optionally, the first LED units in the first area, the second LED units in the second area and the third LED units in the third area are distributed simultaneously in each row and each column, respectively.

In order to further improve the uniformity of the distribution of the first LED units and the second LED units, optionally, the number of the first LED units and the number of the second LED units are the same in any row of LED units or any column of LED units in the LED array. Optionally, each m first LED units and each n second LED units in the LED array are alternately arranged along a row direction or a column direction of the LED array, and m and n are positive integers. In this embodiment, m may be different from n, and in order to improve the uniformity of the distribution of the first LED unit and the second LED unit in each row or each column, optionally, m may be equal to n.

Fig. 7-1 and 7-2 illustrate one possible distribution of the on-off of the LED array at t 1-t 2 and t 2-t 3, respectively, in a second type of zone division. In fig. 7-1 and 7-2, white filled rectangles represent light emitting (i.e., bright) LED units, and black filled rectangles represent non-light emitting (i.e., dead) LED units.

Different from the first type of area division mode, in the second type of area division mode, at any moment when the LED array emits light, the luminous LED units and the non-luminous LED units are alternately distributed in each row and each column, so that the uniformity of on-off distribution in the LED array is improved, and the flickering phenomenon is further reduced.

In order to implement the second type of area division, the light emission control device determines in step S202 that the time interval indicated by the light emission data (shown in table 1) of the first LED unit is different from the time interval indicated by the light emission data (shown in table 2) of the second LED unit. The two time intervals being different means that the two time intervals do not include an intersection. Optionally, the time intervals indicated by the light emission data of all the first LED units determined by the light emission control device are the same, and the time intervals indicated by the light emission data of all the second LED units determined by the light emission control device are the same.

With continued reference to the light emitting device shown in fig. 5, since the same row of LED units are all connected to SW1 or SW2, the same row of LED units in the LED array cannot emit light in different time intervals, and the second type of area division manner cannot be realized.

Assuming that the area where the first LED unit and the second LED unit are located is divided as shown in fig. 7-1, the LED unit that emits light in fig. 7-1 is the first LED unit, and the LED unit that does not emit light is the second LED unit, in order to implement the second type of division and division manner shown in fig. 7-1, fig. 8 illustrates another possible structure of the light emitting device.

As shown in fig. 8, the light emitting device includes a light emitting control device and a backlight panel, and the light emitting control device and the backlight panel can be understood with reference to corresponding contents in the corresponding embodiment of fig. 3, which are not described herein. Unlike fig. 3, in the light emitting device shown in fig. 8, in order to reduce the number of driving circuits and switching circuits, each driving circuit may be used to connect one first LED unit and one second LED unit, the first switching circuit may be used to connect all the first LED units, and the second switching circuit may be used to connect all the second LED units. And, in order to reduce the number of driving pins and switching pins, each driving pin is connected to a cathode (i.e., a second end) of one first LED unit and a cathode (i.e., a second end) of one second LED unit, the first switching pin is connected to anodes (i.e., first ends) of all first LED units, and the second switching pin is connected to anodes (i.e., first ends) of all second LED units.

After the control module performs step S201 and step S202, the light emission data of each LED unit may be determined, and the time interval indicated by the light emission data of the first LED unit determined by the control module is different from the time interval indicated by the light emission data of the second LED unit. Assume that the light emission data of the first LED unit determined by the control module is as shown in table 1, and the light emission data of the second LED unit determined by the control module is as shown in table 2. The following describes the specific implementation procedure of step S203 by way of example with reference to fig. 8.

The control module may control the first switching circuit to input a switching signal, for example, as shown in fig. 6-1, to the first switching pin according to the light emitting data of the first LED unit. Assuming that the working voltage of the LEDs in the LED array is 3V to 4V, the voltage range output by the driving circuit is 2V to 3V, so that the switching signal output by the first switching circuit under the control of the control module is used to control the connected LED units to emit light in the time interval indicated in table 1, and not emit light in other time intervals.

The control module may control the second switching circuit to input a switching signal, for example, as shown in fig. 6-2, to the second switching pin according to the light emitting data of the second LED unit. Assuming that the working voltage of the LEDs in the LED array is 3V-4V, the voltage range output by the driving circuit is 2V-3V, so that the switching signal output by the second switching circuit under the control of the control module is used to control the connected LED units to emit light in the time interval indicated in table 2, and not emit light in other time intervals.

The control module may control the corresponding driving circuit to input a dimming signal as shown in fig. 6-3, for example, according to the light emitting data of each LED unit. Assuming that the LEDs in the LED array have a luminance of L1 under the driving of 10mA current and a luminance of L2 under the driving of 20mA current, since each driving circuit is connected to one first LED unit and one second LED unit, the dimming signal outputted by the driving circuit under the control of the control module is used to control the connected and turned-on LED units (i.e., the first LED units) to emit light according to L1 during the time interval indicated in table 1 and to control the connected and turned-on LED units (i.e., the second LED units) to emit light according to L2 during the time interval indicated in table 2.

Fig. 8 illustrates only the first and second rows of LED units, and other rows of LED units may be connected SW1 or SW2 with reference to the connection manner of the first and second rows, such that the odd-numbered columns and even-numbered columns of the LED array are connected SW1, and the odd-numbered columns and even-numbered columns of the LED array are connected SW2. Thus, the odd-numbered row and odd-numbered column and even-numbered row and even-numbered column LED units emit light during the time intervals indicated in table 1, and do not emit light during other time intervals. The odd-numbered row and even-numbered column and even-numbered row and odd-numbered column LED units emit light during the time intervals indicated in table 2, and do not emit light during other time intervals. Since the time intervals indicated in tables 1 and 2 are different, the on-off distribution of the LED units in the LED array alternately repeats the on-off distribution shown in fig. 7-1 and fig. 7-2. The LED array has even on-off distribution, which is beneficial to reducing the flicker phenomenon of the display.

Fig. 8 is only for exemplary description of possible configurations of the light emitting device, and is not intended to limit the configurations of the light emitting device of the present application. The LED array may take other shapes (e.g., square or circular, etc.), and the LED array may include more or fewer LED units. The backlight panel may include more or fewer pins. The light emission control means may comprise more or fewer driving circuits. The lighting control means may comprise more or fewer switching circuits. The division of each circuit in the light-emitting control device is a logic division, and the embodiment of the application is not limited to a specific implementation manner of the light-emitting control device.

In order to reduce the number of driving pins, fig. 8 illustrates an example in which two LED units in different areas of a backlight panel are multiplexed with one driving pin, rather than limiting that each driving pin is connected to one first LED unit and one second LED unit. Alternatively, the backlight panel may include more LED units, and each driving pin is connected to one LED unit. Alternatively, part of the driving pins are connected with one LED unit, and part of the driving pins are connected with one first LED unit and one second LED unit.

In order to reduce the number of switch pins, fig. 8 illustrates that all LED units in the same area in the backlight panel are multiplexed with one switch pin, rather than limiting that each switch pin is connected to all LED units in the same area. Alternatively, the backlight panel may include more switch pins, each of which is connected to one LED unit. Alternatively, the first switch pin is connected to the plurality of first LED units, the second switch pin is connected to the plurality of second LED units, and the at least one target row and the at least one target column of the LED array simultaneously include at least one first LED unit connected to the first switch pin and at least one second LED unit connected to the second switch pin, respectively. Referring to fig. 8, a first switching pin may be connected to first LED units of a first row and a second row, respectively, a second switching pin may be connected to second LED units of the first row and the second row, respectively, and LED units of other rows in an LED array may be connected to other switching pins than the first switching pin and the second switching pin.

Fig. 8 is an example, but not a limitation, of the driving pin being connected to the cathode of the LED, and the first switching circuit and the second switching circuit being connected to the anode of the LED. Alternatively, the driving pin may be connected to an anode of the LED, and the first switching circuit and the second switching circuit may be connected to a cathode of the LED.

Fig. 8 illustrates an example in which one circuit (e.g., the first switch circuit or the second switch circuit or any one of the driving circuits) in the light emission control device is connected to one pin, but not limited to one circuit, only one pin in the backlight panel can be connected. For example, if a plurality of first LED units are connected to a plurality of switch pins, the first switch circuit may be connected to the plurality of switch pins accordingly. For example, if the plurality of second LED units are connected to the plurality of switch pins, the second switch circuit may be connected to the plurality of switch pins accordingly. For example, if each driving pin is connected to one LED unit, one driving circuit may be connected to one driving pin corresponding to one first LED unit and one driving pin corresponding to one second LED unit.

In order to reduce the number of switching circuits, fig. 8 illustrates an example in which a first switching circuit is used to connect all first LED units in the light emission control device, and an example in which a second switching circuit is used to connect all second LED units, but is not limited thereto. Optionally, the first switch circuit is configured to connect the plurality of first LED units, the second switch circuit is configured to connect the plurality of second LED units, and the at least one target row and the at least one target column of the LED array simultaneously include at least one first LED unit connected to the first switch circuit and at least one second LED unit connected to the second switch circuit, respectively. Referring to fig. 8, a first switching circuit may be used to connect first LED units of a first row and a second row, respectively, and a second switching circuit may be used to connect second LED units of the first row and the second row, respectively, and the light emission control device may connect LED units of other rows in the LED array through other switching circuits than the first switching circuit and the second switching circuit.

2. Technical scheme for reducing tailing phenomenon

The smearing of the display is mainly due to the limited response rate of the display and the visual tracking and spatial resolution characteristics of the human eye.

Taking the process of the display displaying a video (referred to as a target video) as an example, fig. 9-1 to 9-3 respectively illustrate a video frame N-1, a video frame N, and a video frame n+1 in the target video. Video frame N-1, video frame N, and video frame N +1 each comprise a sphere. For ease of description, the positions of the ball in video frame N-1, video frame N, and video frame N+1 are referred to as position N-1, position N, and position N+1, respectively. Referring to fig. 9-1 to 9-3, the positions of the balls in the three video frames are different, which means that when the display switches the output image, the pixel brightness values of the position N-1, the position N and the position n+1 are larger, so that the corresponding liquid crystal molecules in the corresponding positions in the liquid crystal layer deflect at a larger angle under the control of the liquid crystal control device, the limited deflection rate causes the deflection process of the liquid crystal molecules to correspond to a longer response time, and the user can see that the tailing phenomenon exists in the picture output by the display in the process of outputting the corresponding video frame.

If multiple video frames for display on a display include the same motion block, then embodiments of the present application refer to the multiple video frames as target video. If the target image is a frame image in the target video, in order to reduce the smearing, the light emission control method of the present application may further include step S204 after step S202 and before step S203.

S204, performing black insertion processing on luminous data of a plurality of LED units in the LED array;

for any one of the plurality of LED units (denoted as LED unit k), the light emission control means may perform black insertion on the light emission data of the LED unit k, and may decrease the luminance value of the partial time interval indicated by the light emission data of the LED unit k. For convenience of description, a time interval in which the luminance value decreases after black insertion is referred to as a black insertion time interval. It is assumed that the time zone and the luminance value indicated by the light emission data of the LED unit k determined by the light emission control device at step S202 are shown in table 1, and the time zone and the luminance value indicated by the light emission data of the LED unit k after the black insertion process obtained at step S204 are shown in table 3.

Referring to table 3, the black insertion time interval of the led unit k is that the luminance value corresponding to t indicated by the light emitting data after black insertion is lower than the luminance value corresponding to t indicated by the light emitting data before black insertion. In Table 3, L1-L1, alternatively, L1-may be 0, i.e., LED unit k does not emit light at t 1-t 2. Alternatively, L1+ may be equal to L1. Alternatively, in order to ensure that the cumulative luminance of the LED unit k is unchanged, the luminance value of the light-emitting data after black insertion needs to be compensated, that is, l1+ > L1.

TABLE 3 Table 3

Time interval	Brightness value
		t1～t2	L1-
t3～t4	L1+
		t5～t6	L1+

In order to compensate for the decrease in backlight brightness caused by the black insertion process, optionally, in step S204, the light emission control device may enhance the brightness value of a part of the time interval indicated by the light emission data of the LED unit k. For convenience of description, a time interval in which the luminance value increases after black insertion is referred to as an enhanced time interval. With continued reference to Table 3, the LED units k have enhancement time intervals of t 3-t 4 and t 5-t 6.

Table 3 is only an example, and the present embodiment does not limit the enhancement time interval to be all time intervals except the black insertion time interval, and does not limit the black insertion time interval to be the first time interval in the time intervals of light emission. For example, the time interval and the luminance value indicated by the light emission data of the LED unit k after the black insertion process obtained in step S204 are shown in table 4.

TABLE 4 Table 4

Time interval	Brightness value
		t1～t2	L1+
t3～t4	L1-
		t5～t6	L1+

The above describes that the tailing phenomenon of the moving block is advantageously reduced by black inserting the plurality of LED units. The selection of the plurality of LED units is described below with reference to the accompanying drawings.

The first selection mode is as follows: the plurality of LED units are all LED units of the LED array.

To reduce flicker, the black insertion time intervals of the LED units of different rows may be different. For convenience of description, for any time interval, the embodiment of the present application refers to an LED unit that emits light with a luminance value smaller than the luminance value determined in step S202 as a black inserted LED unit.

If the target image is a frame of video (referred to as a target video) including a moving block, the light-emitting control device may select different black insertion time intervals for different rows of LED units to execute step S204 after step S202. For example, referring to the LED array shown in fig. 3, the light emission control device may sequentially select black insertion time intervals from t1 to t2, from t2 to t3, from … …, and from t6 to t7 for the 1 st row LED unit, the 2 nd row LED unit, the … … th row LED unit, and the 6 th row LED unit, and it is understood that the black insertion LED units scan from top to bottom in the LED array from t1 to t 7.

Any one of the technical schemes for reducing tailing phenomenon provided by the embodiments of the present application may be used in combination with any one of the technical schemes for reducing backlight power consumption described above. Based on the time-sharing driving schemes corresponding to fig. 4-1 and 4-2, the distribution conditions of black inserted LED units in the LED array at t 1-t 2 and t 2-t 3 are shown in fig. 10-1 and 10-2, respectively. In fig. 10-1 and 10-2, white filled rectangles represent light emitting LED units, black filled rectangles represent non-light emitting LED units, and hatched filled rectangles represent light-decreasing LED units. Referring to fig. 10-1, the luminance value of the first row of LED units in the LED array is smaller than the luminance value determined in step S202 at t1 to t 2. Referring to fig. 10-2, the luminance value of the second row of LED units in the LED array is smaller than the luminance value determined in step S202 at t2 to t 3. The distribution of black inserted LED units in the LED array at t3 to t7 can be referred to fig. 10-1 and 10-2.

The head raising or lowering of the user is a common motion in the process of viewing the display screen, and as can be seen from fig. 10-1 and fig. 10-2, the black insertion unit scans from top to bottom in the LED array in a time-sharing manner, so that the user can easily see that the screen is in a striped flicker in the process of viewing the display screen.

The second selection mode is as follows: the plurality of LED units correspond to the motion trail of the motion block in the target video.

The plurality of LED units may be determined according to a motion profile. Because the motion track of the motion block in the target video is generally random, the light-emitting control device executes step S204 on the LED unit corresponding to the motion track, which is beneficial to reducing the striped flicker phenomenon seen by the user in the process of head up or head down watching the display picture.

The embodiment of the application does not limit the specific mode of determining the plurality of LED units according to the motion trail, as long as the plurality of LED units can provide backlight for the image block where the motion trail is located. Alternatively, the light emission control device may determine a movement trace region corresponding to the movement trace in the LED array, and then determine a plurality of LED units from the LED array according to the movement trace region. Alternatively, the light emission control device may perform step S204 on the LED units having intersections with the movement trace regions in the LED array.

Any one of the technical schemes for reducing tailing phenomenon provided by the embodiments of the present application may be used in combination with any one of the technical schemes for reducing backlight power consumption described above. Based on the time-sharing driving schemes corresponding to fig. 7-1 and 7-2, the distribution of black inserted LED units in the LED array at t 1-t 2 and t 2-t 3 is as shown in fig. 11-1 to 11-3. In fig. 11-1 to 11-3, white filled rectangles represent light emitting LED units, black filled rectangles represent non-light emitting LED units, diagonal filled rectangles represent light weakening LED units, and an area within a broken line along a diagonal direction of the LED array (referred to as a movement locus area) may correspond to a movement locus of the ball in fig. 9-1 to 9-3, and alternatively, a plurality of LED units may be all LED units having intersections with the movement locus area in the LED array.

The embodiment of the application does not limit the determination method of the motion trail. Alternatively, the light emission control device may perform step S204 on the multi-frame image in the target video using the same motion trajectory. In one possible implementation, the target video sequentially includes a first image (e.g., fig. 9-1), a second image (e.g., fig. 9-2), and a target image (e.g., fig. 9-3) from front to back, and the light emission control device may predict a motion trajectory (e.g., a dotted line region in fig. 9-3) of the motion block in the target video according to the first image and the second image, and then perform step S204 on the target image according to the predicted motion trajectory. The light-emitting control device does not need to determine the black insertion position every two adjacent frames, and is beneficial to saving the calculation resources of the light-emitting control module.

In order to further save the computing resources, after determining the motion trail by the first image and the second image, the light-emitting control device may consider that a preset number of images after the first image or the second image each include the motion block, and for each frame of image within the preset number, the light-emitting control device does not need to perform motion estimation on the image, and may perform step S204 on the image according to the motion trail.

The black insertion processing of the light emission data means that the luminance value of a certain time period (referred to as a black insertion time period) indicated by the light emission data is reduced. If the light-emitting control device selects the same black insertion time interval for all the LED units corresponding to the motion trail, a large number of LED units emit light at a lower brightness at the same time, and a flicker phenomenon is easy to occur. In order to reduce the flicker phenomenon, the light emission control device may select different black insertion time intervals for LED units at different positions among the plurality of LED units.

Optionally, performing black insertion processing on the light emission data of the plurality of LED units in the LED array may include:

s2041, decreasing the luminance value of the first time interval indicated by the light emission data of the LED unit corresponding to the first position, and decreasing the luminance value of the second time interval indicated by the light emission data of the LED unit corresponding to the second position.

The light-emitting control module can determine different black-inserting time intervals for the multiple positions on the motion track, and then reduce the brightness values of the LED units corresponding to the corresponding positions in the corresponding black-inserting time intervals.

Taking the example that the plurality of positions include the first position and the second position, the light-emitting control device may reduce the brightness value of the first time interval indicated by the light-emitting data of the LED unit corresponding to the first position after determining the plurality of LED units according to the motion trail, and reduce the brightness value of the second time interval indicated by the light-emitting data of the LED unit corresponding to the second position. Wherein the first time interval and the second time interval are different. And the black is alternately inserted at a plurality of positions of the motion block in the motion track in different black insertion time intervals, so that the black is inserted at the positions of the motion block in the target image and the front and rear frames of the target image on the premise of reducing flicker, and the tailing phenomenon of the motion block is reduced to a greater extent.

Optionally, the sequence of the first time interval and the second time interval is consistent with the sequence of the first position and the second position in the motion track. Referring to fig. 11-1 to 11-3, the dotted line area of the circle corresponds to the position of the moving block in the moving track, and the diagonally filled rectangle represents the black inserted LED unit, i.e., the LED unit having the light emission luminance value smaller than the luminance value determined in step S202. After the light-emitting control device drives the LED array to emit light, the position change of the black inserting LED unit in the LED array along with time is consistent with the position change of the moving block in the target time frequency along with time. Since the moving block is easily hatched at the position of the previous frame in the process of starting to display the target image, and the moving block is easily hatched at the position of the next frame in the process of starting to display the target image, that is, the change of the position requiring black insertion with time is also consistent with the moving track. Therefore, in the black inserting scheme provided by the embodiment of the application, the position of the black inserting LED unit in the LED array is consistent with the position to be black inserted along with the time, so that the tailing phenomenon of the motion block is reduced to a greater extent.

Fig. 11-1 to 11-3 illustrate only an exemplary manner of selecting a plurality of positions, and are not limiting. Optionally, the light-emitting control device may select positions corresponding to more or fewer motion blocks in the motion trail.

The following describes the device provided in the embodiments of the present application.

The embodiment of the application also provides a light-emitting control device. Alternatively, the light emission control device may be, for example, a light emission control device as shown in fig. 3. The light emission control device may be applied to a light emitting apparatus of a display, the light emitting apparatus including a Light Emitting Diode (LED) array, and the light emission control device may include a control module and a driving module. The control module may be used to perform step S201 and step S202. For example, the control module may be used to obtain image data of a target image for output on a display. The control module is also used for determining the luminous data of each LED unit in the LED array according to the image data. The driving module is configured to perform step S203, for example, to drive the corresponding LED units to emit light according to the emission data of each LED unit determined by the control module.

In one possible implementation, the light emission data of each LED unit indicates a time interval and a brightness value for light emission of the corresponding LED unit, and the time interval indicated by the light emission data of the first LED unit of the first area in the LED array is different from the time interval indicated by the light emission data of the second LED unit of the second area, and each row and each column of the LED array simultaneously includes at least one first LED unit and at least one second LED unit, respectively.

In one possible implementation, the number of first LED units and the number of second LED units in any row of LED units or any column of LED units in the LED array are the same.

In one possible implementation, every m first LED units and every n second LED units in the LED array are alternately arranged along a row direction or a column direction of the LED array, and m and n are positive integers.

In one possible implementation, the target image is a frame of image in a target video, the target video is used for being output on a display, and the target video includes a motion block, and the control module is further configured to perform step S204, for example, perform black insertion processing on light emission data of a plurality of LED units in the LED array before driving the corresponding LED units to emit light according to the light emission data of each LED unit, where the plurality of LED units corresponds to a motion track of the motion block in the target video.

In one possible implementation, the motion trail is predicted from a first image and a second image of the target video that precede the target image, where the first image and the second image include motion blocks.

In one possible implementation manner, the control module is specifically configured to reduce a luminance value of a first time interval indicated by the light emitting data of the LED unit corresponding to the first position, and reduce a luminance value of a second time interval indicated by the light emitting data of the LED unit corresponding to the second position, where the first position and the second position are different positions of the motion block in the motion track.

The embodiments of the present application are not limited to specific implementations of the control module and the drive module. Alternatively, the control module may be a hardware circuit, or a module in the form of software, or a module implemented by combining a hardware circuit with software. For example, when implemented in software, the control module may be implemented by a software functional module that is generated after the processor reads the program code stored in the memory. Or may be implemented in a combination of software and hardware. The driving module may, for example, include a plurality of switching circuits and a plurality of driving circuits as shown in fig. 3.

The embodiment of the application also provides a light emitting device, which can comprise any one of the light emitting control devices and the LED array. Alternatively, the light emitting device may be the light emitting device described in the embodiment corresponding to fig. 3 or fig. 5 or fig. 8.

Embodiments of the present application also provide a display, which may include any of the light emitting devices and the liquid crystal devices described above. Alternatively, the display may be the display described in connection with the embodiment of fig. 1.

The embodiment of the application also provides a backlight lamp panel, which can comprise a Light Emitting Diode (LED) array, a plurality of switch pins and a plurality of driving pins, wherein each switch pin and each driving pin are respectively connected with a first end and a second end of one or more LED units in the LED array. The first switch pins are connected with first ends of a plurality of first LED units in the LED array, the second switch pins are connected with first ends of a plurality of second LED units in the LED array, at least one target row and at least one target column of the LED array respectively and simultaneously comprise at least one first LED unit and at least one second LED unit, and the first switch pins and the second switch pins are two different switch pins.

In one possible implementation, m may be equal to n.

In one possible implementation, at least one driving pin connects the second end of one first LED unit and the second end of one second LED unit at the same time.

Alternatively, the backlight panel may be the backlight panel described in the embodiment corresponding to fig. 8.

The embodiment of the application also provides a light-emitting control device, which is applied to light-emitting equipment of a display, wherein the light-emitting equipment comprises an LED array, and the light-emitting control device comprises a control circuit, a first switch circuit, a second switch circuit and a plurality of driving circuits. Each driving circuit is used for connecting with the second end of one or more LED units in the LED array. The first switch circuit is used for connecting first ends of a plurality of first LED units in the LED array, the second switch circuit is used for connecting a plurality of second LED units in the LED array, and at least one target row and at least one target column of the LED array respectively and simultaneously comprise at least one first LED unit and at least one second LED unit. The control circuit is used for controlling the first switching circuit to output a first switching signal, and the first switching signal is used for controlling the connected LED units to emit light in a first time interval. The control circuit is also used for controlling the second switching circuit to output a second switching signal, and the second switching signal is used for controlling the connected LED units to emit light in a second time interval. The control circuit is also used for controlling each driving circuit to output a dimming signal, and the dimming signal is used for controlling the brightness value of the connected LED units when the LED units emit light.

In one possible implementation, the number of first LED units and the number of second LED units in each target row or each target column are the same.

In one possible implementation, every m first LED units and every n second LED units in each target row or each target column are alternately arranged along the row direction or the column direction of the LED array, and m and n are positive integers. In one possible implementation, m is equal to n.

In one possible implementation, at least one driving circuit is used to connect the second end of one first LED unit and the second end of one second LED unit simultaneously.

It should be further noted that the above-described apparatus embodiments are merely illustrative, wherein elements illustrated as separate elements may or may not be physically separate, and elements shown as elements may or may not be physically separate.

From the above description of the embodiments, it will be apparent to those skilled in the art that some of the steps (e.g., steps S201, S202, and S204) or modules (e.g., control modules) in the embodiments of the present application may be implemented by software plus necessary general purpose hardware, or may be implemented by special purpose hardware including an application specific integrated circuit, a special purpose CPU, a special purpose memory, a special purpose component, or the like. Generally, functions performed by computer programs can be easily implemented by corresponding hardware, and specific hardware structures for implementing the same functions can be varied, such as analog circuits, digital circuits, or dedicated circuits. However, a software program implementation is a preferred embodiment in many cases for the present application. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk or an optical disk of a computer, etc., including several instructions for causing a computer device to perform the method described in the embodiments of the present application.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, communication device, computing device, or data center to another website, computer, communication device, computing device, or data center by a wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a communication device, a data center, or the like that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein.

The term "comprising" is intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those steps or modules that are expressly listed or inherent to such process, method, article, or apparatus.

The naming or numbering of the steps in the present application does not mean that the steps in the method flow must be executed according to the time/logic sequence indicated by the naming or numbering, and the execution sequence of the steps in the flow that are named or numbered may be changed according to the technical purpose to be achieved, so long as the same or similar technical effects can be achieved.

Reference to "a plurality of" embodiments of the present application may refer to two or more.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps described in connection with the embodiments disclosed herein may be embodied in electronic hardware, in computer software, or in a combination of the two, and that the elements and steps of the examples have been generally described in terms of function in the foregoing description to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

Claims

1. A light emission control method, wherein the method is applied to a light emitting device in a display, the light emitting device comprising an array of light emitting diodes, LEDs, the method comprising:

acquiring image data of a target image, the target image being for output on the display;

determining light emitting data of each LED unit in the LED array according to the image data, wherein the light emitting data of each LED unit indicates a time interval and a brightness value of light emitting of the corresponding LED unit, the time interval indicated by the light emitting data of a first LED unit in a first area in the LED array is different from the time interval indicated by the light emitting data of a second LED unit in a second area, and each row and each column of the LED array respectively and simultaneously comprise at least one first LED unit and at least one second LED unit;

And driving the corresponding LED units to emit light according to the light emitting data of each LED unit.

2. The method of claim 1, wherein the number of the first LED units and the number of the second LED units in any row of LED units or any column of LED units in the LED array are the same.

3. The method according to claim 1 or 2, wherein every m of the first LED units and every n of the second LED units in the LED array are alternately arranged in a row direction or a column direction of the LED array, m and n being positive integers.

4. A method according to any one of claims 1 to 3, wherein the target image is a frame of image in a target video, the target video being for output on the display, and the target video comprising a moving block, the method further comprising, prior to said driving the respective LED units to emit light in accordance with the light emission data of each LED unit:

and performing black insertion processing on the luminous data of a plurality of LED units in the LED array, wherein the plurality of LED units correspond to the motion track of the motion block in the target video.

5. The method of claim 4, wherein the motion profile is predicted from a first image and a second image of the target video that precede the target image, the first image and the second image comprising the motion block.

6. The method according to claim 4 or 5, wherein the black inserting process is performed on the light emission data of the plurality of LED units in the LED array, and includes:

and reducing the brightness value of a first time interval indicated by the light-emitting data of the LED unit corresponding to the first position, and reducing the brightness value of a second time interval indicated by the light-emitting data of the LED unit corresponding to the second position, wherein the first position and the second position are different positions of the motion block in the motion trail.

7. A backlight lamp panel, which is characterized in that the backlight lamp panel comprises a Light Emitting Diode (LED) array, a plurality of switch pins and a plurality of driving pins, wherein each switch pin is connected with a first end of one or more LED units in the LED array, and each driving pin is connected with a second end of one or more LED units in the LED array;

the first switch pins are connected with first ends of a plurality of first LED units in the LED array, the second switch pins are connected with first ends of a plurality of second LED units in the LED array, the first switch pins and the second switch pins are two different switch pins, and at least one row and at least one column of the LED array respectively and simultaneously comprise at least one first LED unit and at least one second LED unit.

8. The backlight panel of claim 7, wherein at least one of the driving pins is connected to both the second end of one of the first LED units and the second end of one of the second LED units.

9. A lighting control device, wherein the lighting control device is applied to a lighting device of a display, the lighting device comprises a Light Emitting Diode (LED) array, and the lighting control device comprises a control module and a driving module;

the control module is used for acquiring image data of a target image, and the target image is used for being output on the display;

the control module is further configured to determine, according to the image data, light emission data of each LED unit in the LED array, where the light emission data of each LED unit indicates a time interval and a brightness value of light emission of the corresponding LED unit, and a time interval indicated by the light emission data of a first LED unit in a first area in the LED array is different from a time interval indicated by the light emission data of a second LED unit in a second area, and each row and each column of the LED array simultaneously includes at least one first LED unit and at least one second LED unit, respectively;

The driving module is used for driving the corresponding LED units to emit light according to the light emitting data of each LED unit determined by the control module.

10. The light-emitting control device according to claim 9, wherein the number of the first LED units and the number of the second LED units in any one row of LED units or any one column of LED units in the LED array are the same.

11. The light-emitting control device according to claim 9 or 10, wherein every m of the first LED units and every n of the second LED units in the LED array are alternately arranged in a row direction or a column direction of the LED array, m and n being positive integers.

12. The lighting control device of any one of claims 9-11, wherein the target image is a frame of image in a target video, the target video for output on the display, and the target video comprises a motion block, the control module further configured to:

and before the corresponding LED units are driven to emit light according to the light emitting data of each LED unit, black inserting processing is carried out on the light emitting data of a plurality of LED units in the LED array, wherein the plurality of LED units correspond to the motion track of the motion block in the target video.

13. The lighting control device of claim 12, wherein the motion profile is predicted from a first image and a second image of the target video that precede the target image, the first image and the second image comprising the motion block.

14. The lighting control device of claim 12 or 13, wherein the control module is specifically configured to:

15. A light emitting device comprising an array of light emitting diodes, LEDs, and a light emission control device as claimed in any one of claims 9-14.

16. The light emitting apparatus of claim 15 wherein the LED array is disposed in a backlight panel of claim 7 or 8.

17. A display comprising a light emitting device according to claim 15 or 16.