CN112965298A

CN112965298A - Backlight module, backlight module driving method and device, electronic device and storage medium

Info

Publication number: CN112965298A
Application number: CN202110298657.0A
Authority: CN
Inventors: 文亮
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-06-15

Abstract

The application discloses a backlight module, a driving method and a driving device of the backlight module, an electronic device and a storage medium, and belongs to the technical field of driving of the backlight module. The method comprises the following steps: the target color type of a sub-frame picture to be displayed is determined, a target light source assembly in the backlight module is determined according to the target color type, and the target light source assembly is controlled to emit light, wherein the color type of light emitted by the target light source assembly is the same as the target color type. The driving method can drive the backlight module to emit the light rays with different color types, namely, the light rays with different color types can be emitted without passing through the color filter film layer, so that the light ray transmittance of the backlight module is improved, the utilization rate of the backlight module is improved, and the power consumption of the backlight module is reduced.

Description

Backlight module, backlight module driving method and device, electronic device and storage medium

Technical Field

The application belongs to the technical field of pixel driving, and particularly relates to a backlight module, a backlight module driving method, a backlight module driving device, an electronic device and a storage medium.

Background

A Liquid Crystal Display (LCD) mainly includes a Liquid Crystal Display panel and a backlight module; the liquid crystal display panel includes a Thin Film Transistor (TFT) array substrate, a Color Filter (CF) substrate, and liquid crystal disposed between the two substrates. The backlight module comprises a backlight light source for providing white backlight. The CF substrate mainly comprises a glass substrate, a black matrix layer, a color filter film layer, a protective layer and a supporting layer.

In the process of implementing the present application, the inventor finds that at least the following problems exist in the prior art: the liquid crystal deflects under the action of an electric field, so that the transmission amount of white light provided by the backlight module is controlled, and the transmitted white light can be filtered into three primary colors of red, green and blue through the color filter films of the red, green and blue on the CF substrate to realize color display. Since the light transmittance of the color filter film is low, the utilization rate of the white backlight provided by the backlight module is low, and the power consumption of the backlight module is high, so that how to provide the backlight module with low power consumption becomes a technical problem to be solved urgently.

Disclosure of Invention

An object of the embodiments of the present application is to provide a backlight module, a driving method and device for the backlight module, an electronic device, and a storage medium, which can solve the problems in the prior art that the utilization rate of white backlight provided by the backlight module is low and the power consumption of the backlight module is high due to low light transmittance of a color filter film.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, an embodiment of the present application provides a backlight module, where the backlight module is applied to a display panel, and the display panel includes a CF substrate with a color filter, a TFT substrate with a thin film transistor, and a liquid crystal disposed between the CF substrate and the TFT substrate; the backlight module is arranged on one side of the TFT substrate, which is far away from the CF substrate;

the CF substrate comprises a black matrix layer, a protective layer and a supporting layer which are sequentially stacked;

the backlight module is used for emitting light rays with various color types, and the display panel is used for displaying the sub-frame picture with the target color type under the condition that the backlight module emits the light rays with the target color type.

In a second aspect, an embodiment of the present application provides a backlight module driving method, where the method includes:

determining a target color type of a sub-frame picture to be displayed;

determining a target light source assembly in the backlight module according to the target color type;

and controlling the target light source assembly to emit light, wherein the color type of the light emitted by the target light source assembly is the same as the target color type.

In a third aspect, an embodiment of the present application provides a backlight module driving device, where the device includes:

the first determining module is used for determining the target color type of the sub-frame picture to be displayed;

the second determining module is used for determining a target light source component in the backlight module according to the target color type;

and the control module is used for controlling the target light source assembly to emit light, wherein the color type of the light emitted by the target light source assembly is the same as the target color type.

In a fourth aspect, embodiments of the present application provide an electronic device, which includes a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and when executed by the processor, implement the steps of the method according to the first aspect.

In a fifth aspect, the present embodiments provide a readable storage medium, on which a program or instructions are stored, which when executed by a processor implement the steps of the method according to the first aspect.

In a fifth aspect, an embodiment of the present application provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the method according to the first aspect.

In the embodiment of the application, a target light source assembly in the backlight module is determined by determining a target color type of a sub-frame to be displayed and controlling the target light source assembly to emit light according to the target color type, wherein the color type of light emitted by the target light source assembly is the same as the target color type. The driving method can drive the backlight module to emit the light rays with different color types, namely, the light rays with different color types can be emitted without passing through the color filter film layer, so that the light ray transmittance of the backlight module is improved, the utilization rate of the backlight module is improved, and the power consumption of the backlight module is reduced.

Drawings

Fig. 1 is a schematic cross-sectional view of a pixel unit of a TFT substrate provided in an embodiment of the present application;

fig. 2 is a top view of a pixel unit of a TFT substrate provided in an embodiment of the present application;

fig. 3 is a schematic view of a TFT substrate according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a CF substrate according to an embodiment of the present disclosure;

FIG. 5 is a schematic cross-sectional view of a CF substrate according to an embodiment of the present disclosure;

fig. 6 is a schematic view of a liquid crystal cell according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a backlight module and a liquid crystal cell assembled according to the prior art;

FIG. 8 is a schematic structural diagram of a backlight module provided in the prior art;

FIG. 9 is a schematic diagram illustrating an assembled backlight module and an assembled liquid crystal cell according to an embodiment of the present disclosure;

FIG. 10 is a schematic view of a display panel according to an embodiment of the present disclosure;

FIG. 11 is a schematic view of a light source module according to an embodiment of the present disclosure;

fig. 12 is a schematic view illustrating an RGB light source module according to an embodiment of the present disclosure;

FIG. 13 is a schematic diagram illustrating a positional arrangement of RGB light source modules according to an embodiment of the present disclosure;

FIG. 14 is a schematic diagram illustrating the position arrangement of another RGB light source module provided in the embodiments of the present application;

FIG. 15 is a schematic view of another light source module according to the embodiments of the present disclosure;

FIG. 16 is a schematic diagram of a backlight assembly provided by the prior art;

fig. 17 illustrates a driving method of a backlight module according to an embodiment of the present disclosure;

fig. 18 is a schematic view of a driving system of a backlight module according to an embodiment of the present disclosure;

FIG. 19 is a schematic diagram of a driving waveform provided in an embodiment of the present application;

FIG. 20 is a schematic view of another driving system for a backlight module according to an embodiment of the present disclosure;

fig. 21 is a schematic structural diagram of a display panel driving apparatus provided in an embodiment of the present application;

fig. 22 is a schematic hardware structure diagram of an electronic device implementing an embodiment of the present application;

fig. 23 is a schematic hardware configuration diagram of another electronic device for implementing the embodiment of the present application.

Detailed Description

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

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The pixel driving method provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

To more clearly describe the embodiment of the present invention, a display screen of an electronic device is described. The existing LCD screen manufacturing process mainly includes: manufacturing a TFT substrate, manufacturing a CF substrate, manufacturing a liquid crystal box and assembling a backlight module.

Fig. 1 is a schematic cross-sectional view of a pixel unit of a TFT substrate provided in an embodiment of the present application. Fig. 2 is a top view of a pixel unit of a TFT substrate according to an embodiment of the present disclosure.

Referring to fig. 1 and 2, the manufacturing process of the TFT substrate mainly manufactures each functional layer in the following order of layers:

the pixel structure comprises a glass substrate 101, a buffer layer 102, a shading layer 103, a polycrystalline silicon layer 104, a grid insulating layer 105, a grid 106, an interlayer insulating layer 107, a source/drain metal layer 108, a planarization layer 109, a touch wiring layer 110, a PV1 layer 111, an ITO1 common electrode 112, a PV2 layer 113 and an ITO2 pixel electrode 114. Among them, the ITO thin film is an n-type semiconductor material having high conductivity, high visible light transmittance, high mechanical hardness, and good chemical stability. It is the most commonly used thin film material for transparent electrodes of LCDs, solar cells, and other electronic instruments.

The buffer layer 102 is made of SiO2, and is fabricated on the glass substrate to prevent impurities on the glass substrate from diffusing into the thin film transistor. The light shielding layer 103 is made of molybdenum, the chemical symbol of molybdenum is Mo, and the light shielding layer is arranged below the channel of the thin film transistor to block backlight from irradiating the channel, so that the photoproduction leakage current of the transistor is avoided. The polysilicon layer 104 is mainly made of polysilicon with polycrystalline grains, and serves as a transistor semiconductor active layer. The gate insulating layer 105 is mainly made of silicon oxide and serves as a gate dielectric of the thin film transistor. The gate electrode 106 is made of Mo as a gate electrode of the thin film transistor. The interlayer insulating layer 107 is mainly made of silicon oxide and silicon nitride, and serves as an insulating dielectric layer between the metal layers. The source/drain metal layer 108 is mainly made of titanium-aluminum-titanium multilayer metal and serves as a conductive connection layer for the trace and the source and drain electrodes of the thin film transistor. The planarization layer 109 is mainly made of transparent resin and serves as a planarization layer and an interlayer dielectric. The touch wire layer 110 is made of a molybdenum-aluminum-molybdenum multilayer metal and is used as a wire for connecting the touch sensor and the IC. The PV1 layer 111 is a silicon nitride material that acts as an interlayer dielectric and passivation layer. The ITO1 common electrode 112 is made of an indium tin oxide transparent film and serves as a common electrode. The PV2 layer 113 is a silicon nitride material that acts as an interlayer dielectric and passivation layer. The ITO2 pixel electrode 114 is made of an ITO transparent film as a pixel electrode.

Fig. 3 is a schematic view of a TFT substrate shown in fig. 3, and fig. 3 is a schematic view of a TFT substrate provided in an embodiment of the present application. An array is formed of a plurality of thin film transistors including a gate driving circuit, a glass peripheral region, and the like, and one thin film transistor is indicated by a dashed line block 301 in fig. 3.

The manufacturing flow of the CF substrate is shown in fig. 4:

fig. 4 is a schematic structural diagram of a CF substrate according to an embodiment of the present disclosure. The CF substrate mainly includes the following layers, and the manufacturing flow thereof is to manufacture each functional layer in the order of the following layers. The method mainly comprises the following steps:

a glass substrate 401, a Black Matrix (BM) layer 402, R pixels 403, G pixels 404, B pixels 405, an Overcoat (OC) layer 406, a gap control material (PS) layer including main support posts 407 and auxiliary support posts 408. The R pixel 403, the G pixel 404, and the B pixel 405 belong to a color filter film layer, the color filter film layer needs to filter white backlight, and the color filter film layer of the screen filters red, green, and blue light rays for the white backlight.

The black matrix layer 402 is made of carbon-doped resin and is used for shielding the non-light-emitting area. The R pixel 403 is a red pixel region made of red dye-doped resin and transmits red light. The G pixel 404, i.e., the green pixel region, is made of a green dye-doped resin and transmits green light. The B pixel 405 is a blue pixel region, and is made of blue dye-doped resin, and transmits blue light. The OC layer 406 is made of transparent resin and has a planarization effect. The PS layer is made of resin and plays a role in supporting, and the gap control material in the two substrates plays a role in controlling the thickness and uniformity between the substrates. In fig. 4, an R pixel, a G pixel, and a B pixel are sequentially arranged on the right side of the B pixel 405, where a pixel located on the right side of the B pixel 405 and adjacent to the B pixel 405 is an R pixel. By analogy, the R pixel, the G pixel, and the B pixel are sequentially arranged on the right side of the second B pixel from left to right, four groups of the R pixel, the G pixel, and the B pixel are shown in fig. 4, and a black matrix is arranged between every two pixels.

Fig. 5 is a schematic cross-sectional view of a CF substrate shown in fig. 5, according to an embodiment of the present disclosure. The CF substrate includes a black matrix layer 501, main support columns 502, auxiliary support columns 503, R pixels 504, G pixels 505, and B pixels 506.

The process of manufacturing a liquid crystal cell is shown in fig. 6:

fig. 6 is a schematic view of a liquid crystal cell according to an embodiment of the present application. The CF substrate 601 and the TFT substrate 602 are bonded together by sealant 603, and liquid crystal material is filled in the middle, so as to form a liquid crystal cell of the LCD.

Fig. 7 shows an assembled backlight module of the prior art, and fig. 7 is a schematic diagram of an assembled backlight module and a liquid crystal cell of the prior art, in which fig. 7 shows an assembled backlight module 701 and a liquid crystal cell of fig. 6, the backlight module 701 is attached to the back of the liquid crystal cell, that is, the backlight module is disposed on a side of the TFT substrate away from the CF substrate, the backlight module 701 is lit up to provide white light, and the liquid crystal is driven by an electric field to rotate, so as to control the amount of backlight transmission, thereby controlling the display content.

As shown in fig. 8, fig. 8 is a schematic structural diagram of a backlight module provided in the prior art, where the backlight module includes a reflection plate 801, a light guide plate 802, a backlight source assembly 803, a diffusion plate 804, a lower prism sheet 805, an upper prism sheet 806, and a circle of black glue for adhesion around the reflection plate, the lower prism sheet 805, and the upper prism sheet 806. The light rays emitted from the backlight source assembly 803 enter the light guide plate 802 through the light incident surface of the light guide plate 802, the incident parallel light is converted into planar light through the light guide plate 802, the light rays emitted from the first light emitting surface of the light guide plate are diffused and deflected through the diffusion plate 804, and finally the light rays are converged and the light ray divergence angle is adjusted through the lower prism sheet 805 and the upper prism sheet 806, and the white backlight light rays emitted through the lower prism sheet 805 and the upper prism sheet 806 are filtered out to form the light rays with three primary colors through the color filter film layer on the display panel 807. The reflective plate 801 is used to emit light leaked from the light guide plate 802 to the light guide plate 802, and then convert the light into planar light through the light guide plate 802.

In the prior art, the color filter film is required to filter the white light backlight, and the color filter film of the screen is required to filter the red, green and blue light rays of the white light backlight. The color filter film layer is a material layer with the lowest transmittance in the LCD screen, so that the light transmittance of the whole liquid crystal box is low, and the utilization rate of the backlight module is low, so that the power consumption of the backlight module is high under the condition of requiring light with the same brightness.

In order to improve the light transmittance of the backlight module and reduce the power consumption of the backlight module, the application provides the backlight module which is applied to a display panel, wherein the display panel comprises a CF substrate, a TFT substrate and liquid crystal arranged between the CF substrate and the TFT substrate; the backlight module is arranged on one side of the TFT substrate far away from the CF substrate;

the backlight module is used for emitting light rays with various color types, and the display panel is used for displaying sub-frame pictures with target color types under the condition that the backlight module emits the light rays with the target color types.

The CF substrate provided in the embodiments of the present application is introduced here, and the CF substrate provided in the embodiments of the present application includes a black matrix layer, a protective layer, and a support layer. That is, the CF substrate provided in the present application removes the color filter film layer as shown in fig. 5 in the related art, and retains the BM layer, the OC layer, and the PS layer.

The CF substrate and the TFT substrate provided by the embodiment of the application are attached together, liquid crystal is filled in the middle of the CF substrate and the TFT substrate to form a liquid crystal box of the liquid crystal display, then polaroids are attached to the front side and the back side of the liquid crystal box, the backlight module is attached to the back side, and the backlight module comprises a red light source component, a green light source component and a blue light source component. The red Light source module is, for example, an R (red) Light Emitting Diode (LED) lamp, the green Light source module is, for example, a G (green) LED lamp, and the blue Light source module is, for example, a B (blue) LED lamp. As shown in fig. 9, fig. 9 is a schematic diagram of an assembled backlight module and liquid crystal cell provided in the present embodiment, the backlight module 901 provided in the present embodiment is disposed on a side of the TFT substrate 902 away from the CF substrate 903, and the backlight module 901 includes a red light source component 9011, a green light source component 9012, and a blue light source component 9013.

Wherein the red light source component is used for emitting light of a red type, the green light component is used for emitting light of a green type, and the blue light source component is used for emitting light of a blue type. Therefore, under the condition that the red light source component emits light and the green light source component and the blue light source component do not emit light, the backlight module emits red light; under the condition that the green light source component emits light and the red light source component and the blue light source component do not emit light, the backlight module emits red light; under the condition that the blue light source component emits light and the red light source component and the green light source component do not emit light, the backlight module emits blue light.

In the embodiment of the application, the display panel is used for displaying the sub-frame picture of the target color type under the condition that the backlight module emits the light of the target color type. Wherein the target color type includes any one of a red type, a green type, and a blue type. For example, when the backlight module emits red light, the red light enters the light guide plate 904 through the light incident surface of the light guide plate 904, and then enters the display panel through the diffuser plate and the prism sheet, so as to display a red sub-frame on the display panel. And then the backlight module is controlled to emit green light rays, the green light rays enter the light guide plate 904 through the light incident surface of the light guide plate 904, and then enter the display panel through the diffusion plate and the prism sheet, and a green sub-frame picture is displayed on the display panel. Then, under the condition that the backlight module is controlled to emit blue light, the blue light enters the light guide plate 904 through the light incident surface of the light guide plate 904, and then enters the display panel through the diffuser plate and the prism sheet, so that a blue sub-frame picture is displayed on the display panel. The red subframe picture, the green subframe picture and the blue subframe picture are combined into a frame of color picture in the visual sense of human eyes. As shown in fig. 10, fig. 10 is a schematic display diagram of a display panel according to an embodiment of the present disclosure, in which each pixel unit on the display panel displays red to display a red subframe. The element region of a small square grid in fig. 10 represents a sub-pixel unit, three sub-pixel units arranged laterally or vertically adjacent to each other constitute a pixel unit, and the driving Circuit of the display panel in fig. 10 includes a Flexible Printed Circuit (FPC), a driving Integrated Circuit (IC), and a demultiplexing (Demux) switch Circuit. The FPC is a flexible printed circuit board which is made of polyimide or polyester film as a base material and has high reliability and excellent performance. The driving voltage signal output by the driving IC is connected to a demultiplexing (Demux) switch circuit through a fanout (fanout) wire, and the driving voltage signal is input to the data line through the control of the Demux switch circuit to charge the sub-pixel unit through the data line. The Gate driver (GOA) circuit and the Gate (Gate) are controlled by a clock control signal output from the driver IC, and the GOA circuit in fig. 10 includes a GOA circuit 1001 on the left side and a GOA circuit 1002 on the right side, and the Gate of the sub-pixel unit is controlled to be turned on by the Gate line. The GOA circuit 1001 is connected to the gate lines, and the Demux switch circuit is connected to the data lines.

In the embodiment of the application, the backlight module is used for emitting light rays with different color types, and the display panel is used for displaying the sub-frame picture with the target color type under the condition that the backlight module emits the light rays with the target color type. Because the color filter film layer with lower light transmittance in the CF substrate is removed from the display panel, and the backlight module which can emit light rays with different color types is adopted to replace the backlight module which is used for emitting white light rays in the prior art, the display of color pictures on the display panel can be realized without the color filter film layer. The color filter film layer with lower light transmittance in the CF substrate is removed, so that the light transmittance of the backlight module is improved, the utilization rate of the backlight module is improved, and the power consumption of the backlight module is reduced.

It should be noted that, because the LED of the backlight module has a relatively wide color gamut, after the LED is filtered by the color filter layer of the CF substrate in the prior art, part of the light is lost, which results in a relatively small color gamut, and the color gamut that can be displayed is reduced. In the embodiment of the application, the color filter film layer of the CF substrate is removed, so that the displayable color gamut of the display screen can be improved.

Optionally, the red light source component includes L ultraviolet light emitting diodes and red phosphor disposed around each of the L ultraviolet light emitting diodes, and under excitation of a first target ultraviolet light emitting diode among the L ultraviolet light emitting diodes, the red phosphor disposed around the first target ultraviolet light emitting diode is used to emit red-type light;

the green light source component comprises M ultraviolet light emitting diodes and green fluorescent powder arranged around each of the M ultraviolet light emitting diodes, and the green fluorescent powder arranged around a second target ultraviolet light emitting diode in the M ultraviolet light emitting diodes is used for emitting green type light rays under the excitation of the second target ultraviolet light emitting diode;

the blue light source component comprises N ultraviolet light emitting diodes and blue fluorescent powder arranged around each of the N ultraviolet light emitting diodes, and the blue fluorescent powder arranged around a third target ultraviolet light emitting diode in the N ultraviolet light emitting diodes is used for emitting blue light rays under the excitation of the third target ultraviolet light emitting diode;

wherein L, M, N is a positive integer.

In the embodiment of the present application, reference may be made to fig. 11 for a red light source assembly, a green light source assembly, and a blue light source assembly, where fig. 11 is a schematic structural diagram of a light source assembly provided in the embodiment of the present application. Shown in fig. 11 are an UltraViolet (UV) light emitting diode 1101, an UltraViolet light emitting diode 1103, an UltraViolet light emitting diode 1105, a red phosphor 1102 disposed around the UltraViolet light emitting diode 1101, a green phosphor 1104 disposed around the UltraViolet light emitting diode 1103, and a blue phosphor 1106 disposed around the UltraViolet light emitting diode 1103. The ultraviolet light emitting diode 1101 and the red fluorescent powder 1102 form a red light source component, the ultraviolet light emitting diode 1103 and the red fluorescent powder 1104 form a green light source component, and the ultraviolet light emitting diode 1105 and the red fluorescent powder 1106 form a blue light source component. A red light source assembly, a green light source assembly and a blue light source assembly form a set of RGB light source assemblies.

Referring to fig. 12, fig. 12 is a schematic structural diagram of an RGB light source assembly according to an embodiment of the present disclosure. The RGB light source assembly includes a red light source assembly 1201, a green light source assembly 1202, and a blue light source assembly 1203.

Referring to fig. 13, fig. 13 is a schematic diagram illustrating a position arrangement of RGB light source modules according to an embodiment of the present disclosure, where the RGB light source modules 1301 and the light guide plate 1302 are arranged in a stacked manner as shown in fig. 13, and each light source module in the RGB light source modules is disposed on one side of the light guide plate 1302, and emits light of a certain color type incident to the light guide plate 1302 to the display panel through the light guide plate 1302, so as to display a sub-frame picture of the color type on the display panel.

Alternatively, as shown in fig. 14, fig. 14 is a schematic diagram of a position arrangement of another RGB light source assembly provided in the embodiment of the present application. A plurality of RGB light source assemblies may be disposed side by side at the rear of the display panel. Fig. 14 shows three RGB light source modules arranged on the back surface of the display panel in a direct-illumination type.

A backlight module may include a plurality of RGB light source modules. The backlight module comprises a plurality of red light source assemblies, a plurality of green light source assemblies and a plurality of blue light source assemblies, wherein the red light source assemblies, the green light source assemblies and the blue light source assemblies in the backlight module can be the same in number or different in number. The number of the RGB light source assemblies configured in the backlight module can be determined according to the brightness of the configured display screen.

In fig. 11, red phosphor 1102 is indicated by a thin hatched area, green phosphor 1104 is indicated by a thin hatched area, and blue phosphor 1106 is indicated by a thick hatched area.

Under the excitation of the ultraviolet light emitting diode 1101, the red phosphor 1102 arranged around the ultraviolet light emitting diode 1101 is used for emitting red type light; under the excitation of the ultraviolet light emitting diode 1103, the red phosphor 1104 arranged around the ultraviolet light emitting diode 1103 is used for emitting green type light; under the excitation of the uv led 1105, the red phosphor 1106 disposed around the uv led 1105 is used to emit blue-type light. It should be noted that, in order to prevent the crosstalk problem between the light rays of different color types, a baffle is disposed between the light source assemblies of two adjacent color types in the backlight module. For example, a baffle 1107 is provided between the red light source assembly and the green light source assembly, and a baffle 1108 is provided between the green light source assembly and the blue light source assembly. In the embodiment of the present application, the arrangement order of the red light source assembly, the green light source assembly, and the blue light source assembly in one RGB light source assembly is not limited, for example, the red light source assembly and the blue light source assembly may be adjacent to each other, and then the blue light source assembly is disposed on the right side of the blue light source assembly or on the left side of the red light source assembly.

The fluorescent powder stores the light energy after being irradiated by natural light, daylight lamp light, ultraviolet light and the like, and slowly releases the light energy in a fluorescent mode after the light irradiation is stopped, so that the luminous effect can still be seen at night or in dark places. Therefore, the ultraviolet light emitting diode and the fluorescent powder with different colors can be combined and applied in the application, so that light with different color types can be emitted, and sub-frame pictures with different color types can be displayed on the display panel after the emitted light penetrates through the liquid crystal layer.

Optionally, the red light source component includes P blue light emitting diodes and red phosphor disposed around each blue light emitting diode of the P blue light emitting diodes, and under excitation of a first target blue light emitting diode of the P blue light emitting diodes, the red phosphor disposed around the first target blue light emitting diode is used to emit red-type light;

the green light source component comprises S blue light emitting diodes and green fluorescent powder arranged around each blue light emitting diode in the S blue light emitting diodes, the green fluorescent powder is used for emitting green type light under the excitation of the blue light emitting diodes, and the green fluorescent powder arranged around a second target blue light emitting diode in the S ultraviolet light emitting diodes is used for emitting green type light under the excitation of the second target blue light emitting diode;

the blue light source component comprises T blue light emitting diodes, and each blue light emitting diode in the T blue light emitting diodes is used for emitting light of a blue color type;

wherein P, S, T is a positive integer.

In the embodiment of the present application, reference may be made to fig. 15 for a red light source assembly, a green light source assembly, and a blue light source assembly, and fig. 15 is a schematic structural diagram of another light source assembly provided in the embodiment of the present application. Fig. 15 shows a blue light-emitting diode 1501, a blue light-emitting diode 1503, a blue light-emitting diode 1505, a red phosphor 1502 disposed around the blue light-emitting diode 1501, and a green phosphor 1504 disposed around the blue light-emitting diode 1503. The blue light emitting diode 1501 and the red phosphor 1502 constitute a red light source component, the blue light emitting diode 1503 and the red phosphor 1504 constitute a green light source component, and the blue light emitting diode 1505 is a blue light source component. A red light source assembly, a green light source assembly and a blue light source assembly form a set of RGB light source assemblies. A backlight module may include a plurality of RGB light source modules. The backlight module comprises a plurality of red light source assemblies, a plurality of green light source assemblies and a plurality of blue light source assemblies, wherein the red light source assemblies, the green light source assemblies and the blue light source assemblies in the backlight module can be the same in number or different in number. It should be noted that, in order to prevent the crosstalk problem between the light rays of different color types, a baffle is disposed between the light source assemblies of two adjacent color types in the backlight module. For example, a barrier 1506 is provided between the red light source assembly and the green light source assembly, and a barrier 1507 is provided between the green light source assembly and the blue light source assembly.

In fig. 15, red phosphor 1502 is indicated by a hatched area, and green phosphor 1504 is indicated by a hatched area.

In the above embodiments, the structure of the backlight module in the prior art and the structure provided for the backlight module in the embodiment of the present application are introduced, and then the driving method of the backlight module provided in the embodiment of the present application is introduced.

As shown in fig. 16, fig. 16 is a schematic view of a backlight source assembly provided in the prior art. The power supply chip outputs a positive voltage to an anode 1601 of a backlight source assembly of the backlight module. Fig. 13 shows a backlight source assembly including two parallel LEDs, where one LED includes 8 LED lamps, one LED lamp has a rated voltage of 3V, and the other LED lamp has 8 LED lamps, and the driving voltage is generally 24V. The power supply chip outputs positive voltage to one path of LED anode, and the driving voltage can be direct current voltage or pulse voltage. The backlight source assembly shown in fig. 16 is driven by a driving voltage to emit a white backlight.

In order to display a color picture on the display panel from which the color filter film is removed, the embodiment of the present application provides a driving method for a backlight module, so as to drive the backlight module in the embodiment of the present application to emit light rays with different color types, thereby displaying the color picture on the display panel.

Referring to fig. 17, fig. 17 is a driving method of a backlight module according to an embodiment of the present application, and the driving method of the backlight module according to the embodiment of the present application is used in cooperation with the backlight module according to the embodiment of the present application, and the method includes the following steps:

step 1701, determine the target color type of the sub-frame to be displayed.

Step 1702, determining a target light source assembly in the backlight module according to the target color type.

Step 1703, controlling the target light source assembly to emit light, wherein the color type of the light emitted by the target light source assembly is the same as the target color type.

Optionally, before controlling the target light source assembly to emit light, the method may further include the following steps:

acquiring a charging voltage to be output;

the method for acquiring the charging voltage to be output can be realized by the following steps:

acquiring a driving waveform signal of a dynamic backlight control CABC signal according to the information of the sub-frame picture to be displayed;

and acquiring the charging voltage according to the duty ratio of the driving waveform signal.

Controlling the target light source assembly to emit light at step 1703 may be accomplished by:

and outputting a charging voltage to the anode of the target light source assembly to control the target light source assembly to emit light.

Next, a driving method of the backlight module according to the embodiment of the present application is described with reference to fig. 18, and fig. 18 is a schematic diagram of a driving system of the backlight module according to the embodiment of the present application. The backlight module can be driven by a power chip of the electronic equipment, the power chip can be a Direct current-Direct current (DC-DC) converter, the power chip sends out a positive voltage connected with the anode of the light source component, the three cathodes are respectively controlled by 3 switching elements, and the switching elements can be switching transistors. The display chip adjusts the brightness of the backlight module to be started according to the overall brightness of the content to be displayed. Wherein, a dynamic Backlight Control (CABC) pin of the display chip is connected with a Pulse Width Modulation (PWM) pin of the power chip.

The display chip outputs a driving waveform signal of the CABC through a dynamic Backlight Control (CABC) pin on the display chip according to information of a sub-frame picture to be displayed on the display panel, where the driving waveform signal is as shown in fig. 19, and fig. 19 is a schematic diagram of the driving waveform signal provided in an embodiment of the present application. The power supply chip outputs a path of voltage to the anode 1801 according to the duty ratio of the driving waveform signal, and meanwhile, the power supply chip can determine a target light source assembly in the backlight module according to the target color type of the sub-frame picture to be displayed and control a switch element connected with the target light source assembly to be switched on. As shown in fig. 18, the cathode of the red light source assembly is connected to the switching element 1802, the cathode of the green light source assembly is connected to the switching element 1803, and the cathode of the blue light source assembly is connected to the switching element 1804. When the target light source assembly is a red light source assembly, the switching element 1802 is controlled to be turned on, so that the red light source assembly emits red-type light.

Alternatively, referring to fig. 20, fig. 20 is a schematic view of another driving system of a backlight module provided in the embodiment of the present application.

In fig. 20, an anode 2001 of the red light source module, an anode 2002 of the green light source module, and an anode 2003 of the blue light source module are connected to three pins of the power chip, and a charging voltage can be output to the light source module connected to the pins through a certain pin, so that the light source module connected to the pins is controlled to emit light. For example, if the target light source assembly is a red light source assembly, a charging voltage is output to the anode of the red light source assembly, so that the red light source assembly emits red-type light. The cathodes 2004 of the red, green and blue light source modules in fig. 20 are connected to one pin of the power chip.

It should be noted that the power chip may have a built-in selection control signal, and the target light source assembly is controlled to emit light by the selection control signal, or the target light source assembly is controlled to emit light by a central processing unit of the electronic device, or the target light source assembly is controlled to emit light by the display chip.

According to the backlight module driving method provided by the embodiment of the application, the target light source assembly in the backlight module is determined according to the target color type by determining the target color type of the sub-frame picture to be displayed, and the target light source assembly is controlled to emit light, wherein the color type of the light emitted by the target light source assembly is the same as the target color type. The driving method can drive the backlight module to emit the light rays with different color types, namely, the light rays with different color types can be emitted without passing through the color filter film layer, so that the light ray transmittance of the backlight module is improved, the utilization rate of the backlight module is improved, and the power consumption of the backlight module is reduced.

It should be noted that, in the backlight module driving method provided in the embodiment of the present application, the execution main body may be a backlight module driving device, or a control module in the backlight module driving device, for executing the method for driving the backlight module. In the embodiment of the present application, a method for driving a backlight module by a backlight module driving device is taken as an example, and the backlight module driving device provided in the embodiment of the present application is described.

Referring to fig. 21, fig. 21 is a schematic structural diagram of a display panel driving apparatus provided in an embodiment of the present application, where the apparatus 2100 is disposed in an electronic device of a display panel according to the above embodiment, and the apparatus 2100 includes:

a first determining module 2110 for determining a target color type of a sub-frame to be displayed;

a second determining module 2120, configured to determine a target light source assembly in the backlight module according to the target color type;

the control module 2130 is configured to control the target light source assembly to emit light, where a color type of the light emitted by the target light source assembly is the same as the target color type.

The backlight module driving device provided in the embodiment of the application determines a target light source assembly in the backlight module according to a target color type of a sub-frame to be displayed, and controls the target light source assembly to emit light, wherein the color type of light emitted by the target light source assembly is the same as the target color type. The driving method can drive the backlight module to emit the light rays with different color types, namely, the light rays with different color types can be emitted without passing through the color filter film layer, so that the light ray transmittance of the backlight module is improved, the utilization rate of the backlight module is improved, and the power consumption of the backlight module is reduced.

Optionally, the method further includes:

the acquisition module is used for acquiring the charging voltage to be output;

the control module 2130 is specifically configured to output the charging voltage to an anode of the target light source assembly to control the target light source assembly to emit light.

Optionally, the obtaining module is specifically configured to obtain a driving waveform signal of a dynamic backlight control CABC signal according to the information of the sub-frame to be displayed; and acquiring the charging voltage according to the duty ratio of the driving waveform signal.

The pixel driving device in the embodiment of the present application may be a device, or may be a component in a terminal, an integrated circuit, or a chip. The device can be mobile electronic equipment or non-mobile electronic equipment. By way of example, the mobile electronic device may be a mobile phone, a tablet computer, a notebook computer, a palm top computer, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook or a Personal Digital Assistant (PDA), and the like, and the non-mobile electronic device may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine or a self-service machine, and the like, and the embodiments of the present application are not particularly limited.

The pixel driving device in the embodiment of the present application may be a device having an operating system. The operating system may be an Android (Android) operating system, an ios operating system, or other possible operating systems, and embodiments of the present application are not limited specifically.

The pixel driving device provided in the embodiment of the present application can implement each process implemented by the pixel driving device in the method embodiment of fig. 17, and is not described herein again to avoid repetition.

Optionally, an electronic device is further provided in an embodiment of the present application, as shown in fig. 22, where fig. 22 is a schematic diagram of a hardware structure of an electronic device implementing the embodiment of the present application. The electronic device 2200 includes a processor 2201, a memory 2202, and a program or an instruction stored in the memory 2202 and capable of running on the processor 2201, wherein the program or the instruction implements each process of the embodiment of the pixel driving method when executed by the processor 2201, and can achieve the same technical effect, and the details are not repeated herein to avoid repetition.

It should be noted that the electronic devices in the embodiments of the present application include the mobile electronic devices and the non-mobile electronic devices described above.

The electronic device 2300 includes, but is not limited to: radio frequency unit 2301, network module 2302, audio output unit 2303, input unit 2304, sensor 2305, display unit 2306, user input unit 2307, interface unit 2308, memory 2309, and processor 2310.

Those skilled in the art will appreciate that the electronic device 2300 may also include a power supply (e.g., a battery) to power the various components, which may be logically coupled to the processor 2310 via a power management system to manage charging, discharging, and power consumption management functions via the power management system. The electronic device structure shown in fig. 23 does not constitute a limitation of the electronic device, and the electronic device may include more or less components than those shown, or combine some components, or arrange different components, and thus, the description thereof is omitted.

The processor 2310 is configured to determine a target color type of a sub-frame to be displayed;

The processor 2310 is further configured to obtain a charging voltage to be output;

and outputting the charging voltage to an anode of the target light source assembly to control the target light source assembly to emit light.

The processor 2310 is further configured to obtain a driving waveform signal of a dynamic backlight control CABC signal according to the information of the sub-frame to be displayed;

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the above noise reduction function control method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The processor is the processor in the electronic device in the above embodiment. Readable storage media, including computer-readable storage media, such as Read-Only Memory (ROM), random-access Memory (RAM), magnetic or optical disks, etc.

It should be understood that, in the embodiment of the present application, the input Unit 2304 may include a Graphics Processing Unit (GPU) 23041 and a microphone 23042, and the Graphics processor 23041 processes image data of still pictures or videos obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 2306 may include a display panel 23061, and the display panel 23061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 2307 includes a touch panel 23071 and other input devices 23072. The touch panel 23071 is also referred to as a touch screen. The touch panel 23071 may include two parts of a touch detection device and a touch controller. Other input devices 23072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein. The memory 2309 may be used to store software programs as well as various data including, but not limited to, application programs and an operating system. The processor 2310 may integrate an application processor, which primarily handles operating systems, user interfaces, application programs, etc., and a modem processor, which primarily handles wireless communications. It is to be appreciated that the modem processor can be separate from and integrated with the processor 2310.

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the pixel driving method embodiment, and the same technical effect can be achieved.

It should be understood that the chips mentioned in the embodiments of the present application may also be referred to as system-on-chip, system-on-chip or system-on-chip, etc.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A backlight module is applied to a display panel and is characterized in that the display panel comprises a CF substrate of a color filter film, a TFT substrate of a thin film transistor and liquid crystal arranged between the CF substrate and the TFT substrate; the backlight module is arranged on one side of the TFT substrate, which is far away from the CF substrate;

2. A backlight module according to claim 1, wherein the backlight module comprises: a red light source assembly, a green light source assembly, and a blue light source assembly; the target color type includes any one of a red type, a green type, and a blue type;

under the condition that the red light source component emits light and the green light source component and the blue light source component do not emit light, the backlight module emits red light; under the condition that the green light source component emits light and the red light source component and the blue light source component do not emit light, the backlight module emits red light; and under the condition that the blue light source component emits light and the red light source component and the green light source component do not emit light, the backlight module emits blue light.

3. The backlight module as claimed in claim 2, wherein the red light source assembly comprises L uv leds and red phosphors disposed around each of the L uv leds, and the red phosphors disposed around a first target uv led of the L uv leds are configured to emit red-type light rays under excitation of the first target uv led;

the green light source component comprises M ultraviolet light emitting diodes and green fluorescent powder arranged around each of the M ultraviolet light emitting diodes, and the green fluorescent powder arranged around a second target ultraviolet light emitting diode in the M ultraviolet light emitting diodes is used for emitting green type light under the excitation of the second target ultraviolet light emitting diode;

the blue light source component comprises N ultraviolet light emitting diodes and blue fluorescent powder arranged around each of the N ultraviolet light emitting diodes, and under the excitation of a third target ultraviolet light emitting diode in the N ultraviolet light emitting diodes, the blue fluorescent powder arranged around the third target ultraviolet light emitting diode is used for emitting blue light;

wherein L, M, N is a positive integer.

4. The backlight module as claimed in claim 2, wherein the red light source assembly comprises P blue leds, and a red phosphor disposed around each of the P blue leds, and under excitation of a first target blue led of the P blue leds, the red phosphor disposed around the first target blue led is configured to emit red-type light;

the blue light source assembly comprises T blue light emitting diodes, each of the T blue light emitting diodes for emitting light of a blue type;

wherein P, S, T is a positive integer.

5. The backlight module as claimed in claim 1, wherein a baffle is disposed between two adjacent light source modules of color types.

6. A backlight module driving method according to any one of claims 1-5, the method comprising:

determining a target color type of a sub-frame picture to be displayed;

7. The method as recited in claim 6, further comprising, prior to said controlling said target light source assembly to emit light:

acquiring a charging voltage to be output;

the controlling the target light source assembly to emit light comprises the following steps:

8. The method of claim 7, wherein the obtaining the charging voltage to be output comprises:

9. A backlight module driving device, comprising:

10. The apparatus of claim 9, further comprising:

the acquisition module is used for acquiring the charging voltage to be output;

the control module is specifically configured to output the charging voltage to an anode of the target light source assembly to control the target light source assembly to emit light.

11. The apparatus according to claim 10, wherein the obtaining module is specifically configured to obtain a driving waveform signal of a dynamic backlight control cabac signal according to the information of the sub-frame to be displayed; and acquiring the charging voltage according to the duty ratio of the driving waveform signal.

12. An electronic device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the backlight module driving method according to any one of claims 6-8.

13. A readable storage medium, storing thereon a program or instructions, which when executed by a processor, implement the steps of the backlight module driving method according to any one of claims 6-8.