Control method, dimming controller, and display device

Abstract

In a control method, a dimming controller (200), and a display device, the method comprises: obtaining a voltage state of each output channel of any number of driving units (110), wherein the voltage state includes an undervoltage state, an overvoltage state, and a stable state; a step (S101) wherein the voltage state of each output channel of each driving unit (110) is determined by the driving unit (110) based on the voltage of the output channel within a preset time and a stable operating voltage range; and a step (S102) of adjusting the voltage of the power supply terminals of all light-emitting units (120) of the backlight unit (100) based on the voltage state of each output channel of any number of driving units (110). The present method can reduce power loss of the display device and ensure screen display.

Description

Technology Field

[0001] This application claims priority to a Chinese patent application filed with the Chinese Patent Office on December 31, 2021, with application number 202111649268.4 and titled "Control method, dimming controller and display device," the entire contents of which are incorporated by reference into this application.

[0002] The present application relates to a control method, a dimming controller, and a display device, but is not limited thereto. Background Technology

[0003] With the advancement of technology, display devices have become important components of numerous electronic devices, such as Liquid Crystal Displays (abbreviated as 'LCD displays').

[0004] Display devices generally consist of a liquid crystal panel and a backlight circuit. The backlight circuit is located at the bottom of the liquid crystal panel and provides backlighting to the panel. How to reduce power loss in the backlight circuit without affecting the data display of the display device has long been a challenge to be solved. means of solving the problem

[0005] An embodiment of the present application provides a control method, the method is applied to a dimming controller, and the display device includes a dimming controller and a backlight unit; each backlight unit includes a plurality of driving units, and one output channel of each driving unit is connected to a control terminal of a light-emitting unit, and the method is

[0006] A step of obtaining the voltage state of each output channel of an arbitrary number of driving units, wherein the voltage state includes an undervoltage state, an overvoltage state, and a stable state; wherein the voltage state of the output channel of each driving unit is determined by the driving unit based on the voltage of the output channel within a preset time and the stable operating voltage range;

[0007] It includes a step of adjusting the voltage of the power supply terminals of all light-emitting units of the backlight unit based on the voltage status of each output channel of any number of driving units.

[0008] In one embodiment, the step of adjusting the voltage of the power supply terminals of all light-emitting units of the backlight unit based on the voltage state of each output channel of any number of driving units is specifically:

[0009] A step of statistically calculating the quantity of output channels corresponding to each voltage state, and determining the voltage state of the backlight unit based on the quantity of output channels corresponding to each voltage state and the priority of each voltage state;

[0010] It includes a step of adjusting the voltage of the power supply terminals of all light-emitting units of the backlight unit based on the voltage status of the backlight unit.

[0011] In one embodiment, the step of determining the voltage state of a backlight unit based on the quantity of output channels corresponding to each voltage state and the priority of each voltage state is specifically:

[0012] When the number of output channels corresponding to a single voltage state is at its maximum, a step of making the voltage state in which the number of corresponding output channels is at its maximum the voltage state of the backlight unit;

[0013] When the number of output channels corresponding to multiple voltage states is at its maximum, a step of selecting the one with a higher priority among the multiple voltage states where the number of corresponding output channels is at its maximum as the voltage state of the backlight unit;

[0014] or

[0015] The method includes the step of determining that the quantity of corresponding output channels in each voltage state satisfies a critical condition as a reserve voltage state; and determining that the reserve voltage state with the highest priority is the voltage state of the backlight unit.

[0016] In one embodiment, the power supply terminals of all light-emitting units are connected to a common power terminal; and the step of adjusting the voltage of the power supply terminals of all light-emitting units of the backlight unit based on the voltage state of the backlight unit is specifically,

[0017] It includes a step of adjusting the voltage of the common power supply based on the voltage status of the backlight unit to adjust the voltage of the power supply of all light-emitting units of the backlight unit.

[0018] In one embodiment, the display device further includes a voltage conversion module, and the voltage conversion module is connected to a common power supply; the step of adjusting the voltage of the common power supply based on the voltage state of the backlight unit is specifically,

[0019] It includes a step of generating a control command based on the voltage status of the backlight unit, wherein the control command is for controlling a voltage conversion module to adjust the voltage of the common power supply.

[0020] In one embodiment, the step of generating a control command based on the voltage state of the backlight unit is specifically,

[0021] A step of generating a step-down command when the voltage state of the backlight unit is in an overvoltage state, wherein the step-down command is intended to control a voltage conversion module to lower the voltage of the common power supply;

[0022] A step of generating a boost command when the voltage state of the backlight unit is an undervoltage state, wherein the boost command is intended to control a voltage conversion module to increase the voltage of the common power supply;

[0023] It includes a step of generating a hold command when the voltage state of the backlight unit is in a stable state, wherein the hold command is for controlling a voltage conversion module to maintain the voltage of the common power supply.

[0024] In one embodiment,

[0025] For each output channel, if the voltage of the output channel is greater than the phase boundary of the stable operating voltage range, the output channel is in an overvoltage state;

[0026] If the voltage of the output channel is lower than the lower boundary of the stable operating voltage range, the output channel is in an undervoltage state;

[0027] When the voltage of the output channel is within the stable operating voltage range, the output channel is in a stable state.

[0028] A dimming controller of another embodiment of the present application includes a processor and a memory connected to the processor in communication;

[0029] Memory stores computer execution commands;

[0030] The processor executes computer execution instructions stored in memory to implement the control method according to the above embodiment.

[0031] Another embodiment of the present application provides a display device, wherein the display device comprises a dimming controller and a backlight unit provided in the embodiment; each backlight unit comprises any number of modules, each module comprises a plurality of driving units and a plurality of light-emitting units, and one output channel of each driving unit is connected to a control terminal of one light-emitting unit; each driving unit is also connected to a dimming controller.

[0032] In one embodiment, the display device further includes a voltage conversion module, the voltage conversion module is connected to a dimming controller, the voltage conversion module is also connected to a common power supply, and the power supply terminals of all light-emitting units are connected to the common power supply. Effects of the invention

[0033] The present application provides a control method, a dimming controller, and a display device. When a driving unit controls the light emission of a light-emitting unit, the pressure drop of the light-emitting unit changes according to the temperature rise and the screen being displayed, and the voltage of the output channel of the driving unit also changes. The voltage state of each output channel is determined based on a stable operating voltage range and the voltage of each output channel of an arbitrary number of driving units. Based on the voltage state of each output channel, the voltage of the power supply terminal of all light-emitting units of the backlight unit is adjusted. By adjusting the voltage of the power supply terminal of the light-emitting unit, power loss of the backlight unit can be reduced and a screen display effect can be secured. Furthermore, there is no need to add a sensor to monitor the voltage state of the backlight unit, the thickness of the display device is not increased, and the cost is lower. Brief explanation of the drawing

[0034] The drawings attached herein are incorporated into the specification and constitute part of the specification to illustrate embodiments conforming to the present application and are used together with the specification to interpret the principles of the present application. FIG. 1 is a structural diagram of a display device provided in one embodiment of the present application. FIG. 2 is a circuit diagram of a display device provided in another embodiment of the present application. FIG. 3 is a flowchart of a control method provided in one embodiment of the present application. FIG. 4 is a diagram of the voltage state of an output channel provided in another embodiment of the present application. FIG. 5 is a flowchart of a control method provided in one embodiment of the present application. FIG. 6 is a structural diagram of a control device provided in one embodiment of the present application. FIG. 7 is a structural diagram of a dimming controller provided in another embodiment of the present application. Clear embodiments of the present application are presented through the drawings above, and a more detailed description will follow. These drawings and text descriptions are not intended to limit the spirit of the present application in any way, but are intended to explain the concept of the present application to those skilled in the art by reference to specific embodiments. Specific details for implementing the invention

[0035] Exemplary embodiments are described in detail herein, and such examples are illustrated in the drawings. Where the following description relates to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not representative of all embodiments consistent with this application. On the contrary, they are merely examples of apparatus and methods consistent with some aspects of this application as described in detail in the appended claims.

[0036] Display devices are important components of numerous electronic devices, such as TVs equipped with display devices and monitors equipped with display devices. An embodiment of the present application provides a display device. Here, the display device comprises a cover plate, a liquid crystal panel, a backlight structure, and a circuit board. Here, the cover plate is located on the upper part of the liquid crystal panel and protects the liquid crystal panel. The backlight structure is located on the lower part of the liquid crystal panel and provides a backlight to the liquid crystal panel, and the circuit board is connected to the liquid crystal panel and drives the liquid crystal panel so that the liquid crystal panel displays various content.

[0037] As illustrated in FIGS. 1 and 2, the display device includes a dimming controller (200) (Dimming Controller, abbreviated: DCON), a timing controller (300) (Timing Controller, abbreviated: TCON), a backlight unit (100) (Back light Unit, abbreviated: BLU), and a liquid crystal panel (600). The dimming controller (200) generates a control signal according to dimming data output from the timing controller (300), and the control signal controls the driving unit (110) within the backlight unit (100) to generate a driving signal. The driving unit (110) provides a driving signal to the light-emitting unit (120), and the driving signal controls the light-emitting brightness of the light-emitting unit (120) to provide a backlight of various brightness levels.

[0038] Below, the backlight structure of the display device will be described in detail. The backlight structure generally includes a reflective film, a scattering film, and a backlight unit (100). The backlight unit (100) is used to provide backlight, and the reflective film and the scattering film make the light distribution provided by the light-emitting unit (120) more uniform.

[0039] As illustrated in FIG. 2, the backlight unit (100) includes an arbitrary number of modules, and each module includes a plurality of driving units (110) and a plurality of light-emitting units (120). The plurality of driving units (110) represent an array distribution, for example, such as an M×N array distribution. In the drawing, only the driving unit (110) of the first row, first column, the driving unit (110) of the first row, M column, the driving unit (110) of the Nth row, first column, and the driving unit (110) of the Nth row, M column are shown. Each driving unit (110) is connected to a plurality of light-emitting units (120), and a plurality of output channels are installed in the driving unit (110). Each output channel is connected to a control terminal of a single light-emitting unit (120), and the power supply terminal of each light-emitting unit (120) is connected to a power source (Vled). The driving unit (110) provides a driving signal to the light-emitting unit (120). For example, the light-emitting unit (120) includes a plurality of series-connected light-emitting diodes, and the positive electrode of the light-emitting diode located at the leading end is to be connected to a power source (Vled) as a power supply terminal of the light-emitting unit (120). The negative electrode of the light-emitting diode located at the terminal end is to be connected to a driving unit (110) as a control terminal of the light-emitting unit (120).

[0040] Referring further to FIG. 2, the display device provided in the embodiment of the present application further includes a voltage conversion module (400), the control terminal of the voltage conversion module (400) is connected to a dimming controller (200), the DC side of the voltage conversion module (400) is connected to a common power supply terminal (Com), and the power supply terminals of all light-emitting units (120) are connected to the common power supply terminal (Com). The voltage conversion module (400) adjusts the voltage of the power supply terminals of all light-emitting units (120) according to the command of the dimming controller (200) to reduce power loss of the display device without affecting the backlight intensity. The voltage conversion module (400) may be an alternating current-direct current (AC-DC) converter or a direct current-direct current (DC-DC) converter. If the voltage conversion module is an AC-DC converter, the AC side of the voltage conversion module is connected to an AC power supply. If the voltage conversion module is a DC-DC converter, the other DC side of the voltage conversion module is connected to a DC power source.

[0041] The embodiments of the present application aim to provide a control method, a controller, and a display device, thereby reducing power loss of the display device without affecting the screen display. The technical concept of the present application is as follows: When a driving unit controls the light emission of a light-emitting unit, the voltage drop of the light-emitting unit changes according to the temperature rise and the screen being displayed, and the voltage of the output channel of the driving unit also changes. However, if the voltage of the output channel of the driving unit is too low, it affects the normal operation of the driving unit, and if the voltage of the output channel of the driving unit is too high, the power loss increases. Based on the above analysis process, the dimming controller reads the voltage state of each output channel of an arbitrary number of driving units, determines a control strategy for the power supply of the light-emitting unit based on the voltage state of each output channel, and adjusts the voltage of the power supply of the light-emitting unit to achieve the effect of reducing power loss and securing the screen display.

[0042] As illustrated in FIG. 3, one embodiment of the present application provides a control method, said control method is executed in a dimming controller, said control method comprises the following steps.

[0043] Step (S101), the voltage status of each output channel of any number of driving units is obtained.

[0044] In the above step, the display device includes one backlight unit, and the backlight unit includes an arbitrary number of modules, each module includes a plurality of driving units and a plurality of light-emitting units, and the driving unit is equipped with a plurality of output channels, and one output channel of the driving unit is connected to the control terminal of one light-emitting unit.

[0045] The driving unit stores the voltage of each output channel for a preset time at a preset sampling frequency. Here, the shortest time length of the preset time is the shortest time required for the driving unit to acquire the voltages of the multiple output channels, and the longest time length of the preset time is determined by the minimum allowable change time of the voltage at the power supply of the light-emitting unit, and the minimum allowable change time is intended to ensure that no flickering occurs on the display screen.

[0046] The voltage status of the output channel of each driving unit is determined based on the voltage of the output channel during a preset time and the stable operating voltage range. The stable operating voltage range is set according to application requirements. After obtaining the stable operating voltage range, the voltage status of each output channel of the driving unit is obtained by comparing the voltage of each output channel with the stable operating voltage range.

[0047] Here, voltage states include undervoltage state, overvoltage state, and stable state. As shown in FIG. 4, for each output channel, if the voltage of the output channel is greater than the upper boundary of the stable operating voltage range, the output channel is in an overvoltage state. If the voltage of the output channel is less than the lower boundary of the stable operating voltage range, the output channel is in an undervoltage state. If the voltage of the output channel is within the stable operating voltage range, the output channel is in a stable state.

[0048] It needs to be explained that the dimming controller can acquire the voltage status of the output channels of all driving units in the BLU, can acquire the voltage status of the output channels of driving units on any one row or multiple rows, can acquire the voltage status of the output channels of driving units on any one column or multiple columns, and can acquire the voltage status of the output channels of driving units located within a certain area.

[0049] Step (S102), the voltage of the power supply terminals of all light-emitting units of the backlight unit is adjusted based on the voltage status of each output channel of any number of driving units.

[0050] In the above step, after obtaining the voltage state of each output channel of any number of driving units, the voltage state of each output channel of any number of driving units is statistically analyzed to determine the voltage state of the backlight unit. Furthermore, when performing the statistical analysis, the priority of each voltage state may be combined to reduce power loss of the display device while simultaneously improving the display effect.

[0051] For example, when the voltage state of most output channels is undervoltage, it is determined that the backlight unit is in an undervoltage state, and the voltage of the power supply terminals of all light-emitting units must be increased. When the voltage state of most output channels is overvoltage, it is determined that the backlight unit is in an overvoltage state, and the voltage of the power supply terminals of all light-emitting units must be decreased. When the voltage state of most output channels is stable, it is determined that the backlight unit is in a stable state, and the voltage of the power supply terminals of all light-emitting units must be maintained.

[0052] In one embodiment, the power supply terminal of the light-emitting unit is connected to a common power terminal (Com), and the dimming controller can uniformly adjust the voltage of the power supply terminal of the light-emitting unit simply by adjusting the voltage of the common power terminal (Com) after determining the voltage state of the backlight unit.

[0053] In the above technical solution, the driving unit determines the voltage state of each output channel based on a stable operating voltage range and the voltage of the output channel, and the dimming controller acquires the voltage state of the output channel of an arbitrary number of driving units and adjusts the voltage of the power supply terminal of all light-emitting units based on the voltage state of each output channel, thereby reducing power loss of the backlight unit and securing a screen display effect.

[0054] As illustrated in FIG. 5, another embodiment of the present application provides a control method, said control method comprising the following steps.

[0055] Step (S201), obtain the voltage status of each output channel of any number of driving units.

[0056] In the above steps, the voltage state includes an undervoltage state, an overvoltage state, and a stable state, and the driving unit collects the voltage of the output channel within a preset time and compares the voltage of each output channel with the stable operating voltage range to obtain the voltage state of each output channel.

[0057] Step (S202), determine whether the voltage status of each output channel of any number of driving units has been obtained, and if "yes", proceed to Step (S203), and if "no", proceed to Step (S201).

[0058] Here, if the BLU includes M×N driving units and each driving unit includes L output channels, only the voltage state of each output channel of P driving units is obtained, and whether the voltage state of P×L output channels is obtained is determined, where M, N, L, and P are integers greater than 0 and P < M×N.

[0059] Step (S203), the number of output channels corresponding to each voltage state is statistically calculated, and the voltage state of the backlight unit is determined based on the number of output channels corresponding to each voltage state and the priority of each voltage state.

[0060] In the above steps, statistically determining the quantity of output channels corresponding to each voltage state means statistically determining the quantity of output channels in an overvoltage state, statistically determining the quantity of output channels in an undervoltage state, and statistically determining the quantity of output channels in a stable state.

[0061] In one embodiment, after statistically analyzing the number of output channels corresponding to each voltage state, the voltage state with the maximum number of output channels is determined, and when the number of output channels corresponding to only one voltage state is maximum, the voltage state with the maximum number of output channels is set as the voltage state of the backlight unit. When the number of output channels corresponding to multiple voltage states is maximum, the one with the higher priority among the multiple voltage states with the maximum number of output channels is selected as the voltage state of the backlight unit.

[0062] In one embodiment, a threshold condition for each voltage state is stored locally, and the threshold condition corresponding to each voltage state may be different or the same. A state in which the quantity of output channels corresponding to each voltage state satisfies the threshold condition is set as a reserve voltage state; and the reserve voltage state with the highest priority is set as the voltage state of the backlight unit.

[0063] Here, the threshold condition for a specific voltage state specifically includes whether the quantity of output channels corresponding to that voltage state is greater than a preset quantity threshold. If it is greater than the preset quantity threshold, it indicates that the quantity of output channels corresponding to that voltage state satisfies the threshold condition. If it is less than or equal to the preset quantity threshold, it indicates that the quantity of output channels corresponding to that voltage state does not satisfy the threshold condition.

[0064] Step (S204), a control command is generated based on the voltage status of the backlight unit, wherein the control command is intended to control the voltage conversion module to adjust the voltage of the power supply terminals of all light-emitting units of the backlight unit.

[0065] In the above step, the power supply terminals of all light-emitting units are connected to a common power terminal (Com), and the display device further includes a voltage conversion module, the voltage conversion module is connected to the common power terminal (Com) and generates a control command based on the voltage status of the backlight unit, and the control command is intended to implement the adjustment of the voltage of the power supply terminals of all light-emitting units of the backlight unit by controlling the voltage conversion module to adjust the voltage of the common power terminal (Com).

[0066] In one embodiment, a step-down command is generated when the voltage state of the backlight unit is in an overvoltage state. The step-down command is intended to control a voltage conversion module to lower the voltage of the power supply terminals of all light-emitting units of the backlight unit.

[0067] A boost command is generated when the voltage status of the backlight unit is in an undervoltage state. The boost command is intended to control the voltage conversion module to increase the voltage of the power supply terminals of all light-emitting units of the backlight unit.

[0068] A hold command is generated when the voltage state of the backlight unit is stable, and the hold command is intended to control the voltage conversion module to maintain the voltage of the power supply terminals of all light-emitting units of the backlight unit.

[0069] In the above technical solution, the voltage status of each output channel of an arbitrary number of driving units is statistically analyzed, the voltage status of the backlight unit is obtained based on the statistical results and the priority of the voltage status, and the voltage adjustment strategy of the power supply terminal of the light-emitting unit is determined based on the voltage status of the backlight unit, thereby enabling more accurate adjustment of the voltage of the power supply terminal of the light-emitting unit. Furthermore, by using a voltage conversion module to adjust the voltage of the common power supply terminal, adjustment of the power supply terminals of all light-emitting units is implemented, eliminating the need to adjust the voltage of the power supply terminal of each light-emitting unit individually and simplifying the structure of the display device.

[0070] Another embodiment of the present application provides a control method, said control method is executed in a dimming controller, said control method comprises the following steps.

[0071] Step (S301), obtain the voltage status of each output channel of any number of driving units.

[0072] In the above steps, for example, 64×32 driving units are installed in the display device, and each driving unit is equipped with 4 output channels, and each output channel is connected to a series-connected light-emitting diode in a row.

[0073] Each driving unit reads the voltage of the four output channels within a preset time and determines the voltage status of the four output channels based on the stable operating voltage range and the voltage of the four output channels.

[0074] Here, the minimum preset time is the time during which the voltage of the output channel can be acquired, and the maximum preset time is the time during which the voltage converter controls the voltage of the power supply of the light-emitting unit without affecting the display (e.g., flickering appearing on the screen).

[0075] In the above step, if the voltage of the first output channel of any one of the driving units obtained in step (S301) is 0.5V, the voltage of the second output channel is 1.5V, the voltage of the third output channel is 1.5V, and the voltage of the fourth output channel is 2V, a stable operating voltage range [1V, 2V] is set.

[0076] For the above-mentioned driving unit, it can be determined that the first output channel is in an undervoltage state, the second output channel and the third output channel are in a stable state, and the fourth output channel is in an overvoltage state.

[0077] For any number of driving units among 64×32 driving units, the driving unit repeats the step of determining the voltage state of the output channel described above.

[0078] Step (S302), determine whether the voltage status of each output channel of any number of driving units has been obtained. If "Yes," proceed to Step (S303), and if "No," proceed to Step (S301).

[0079] Step (S303), the number of output channels corresponding to each voltage state is statistically calculated, and the voltage state of the backlight unit is determined based on the number of output channels corresponding to each voltage state and the priority of each voltage state.

[0080] In the above step, the dimming controller statistically determining the voltage state of each output channel of any number of driving units within a preset time means obtaining the number of output channels in an undervoltage state, the number of output channels in an overvoltage state, and the number of output channels in a stable state. After obtaining the number of output channels corresponding to the three states, the voltage state of the backlight unit is determined based on the above quantity.

[0081] In one embodiment, the voltage state of the backlight unit is defined as the state in which the number of output channels is maximum among the undervoltage state, overvoltage state, and stable state. When the number of output channels corresponding to two states in parallel is the highest among the three states, the voltage state of the backlight unit is determined based on the priority of the voltage state. For example, if the number of output channels in the undervoltage state and the number of output channels in the stable state are equal, and both are greater than the number of output channels in the overvoltage state, and the priority of the undervoltage state is higher than the priority of the stable state, the backlight unit is determined to be in the undervoltage state.

[0082] In one embodiment, it is determined whether the quantity of output channels corresponding to each voltage state satisfies a threshold condition, and based on the priority of each voltage state, one voltage state that satisfies the threshold condition is selected as the voltage state of the backlight unit.

[0083] For one type of voltage state, satisfying the threshold condition includes the quantity of output channels in the corresponding voltage state being greater than a preset threshold, or satisfying the threshold condition includes the ratio between the quantity of output channels in the corresponding voltage state and the total quantity of all output channels of the display device being greater than a preset ratio. The threshold condition corresponding to each voltage state is different; for example, if the ratio between the quantity of output channels in the undervoltage state and the quantity of all output channels exceeds 10%, the threshold condition for the undervoltage state is satisfied. If the ratio between the quantity of output channels in the overvoltage state and the quantity of all output channels exceeds 20%, the threshold condition for the overvoltage state is satisfied.

[0084] Step (S304), the voltage of the power supply terminals of all light-emitting units of the backlight unit is adjusted based on the voltage status of the backlight unit.

[0085] In the above step, after determining the voltage state of the backlight unit, a control signal for the voltage conversion module is generated based on the voltage state of the backlight unit, so that the voltage conversion module adjusts the voltage of the power supply terminals of all light-emitting units of the backlight unit.

[0086] When the voltage state of the backlight unit is in an undervoltage state, a boost command is generated to control the voltage conversion module to raise the DC side voltage connected to the power supply terminal of the light-emitting unit, thereby adjusting the voltage of the power supply terminal of all light-emitting units of the backlight unit.

[0087] When the voltage state of the backlight unit is in an overvoltage state, a step-down command is generated to control the voltage conversion module and lower the DC side voltage connected to the power supply terminal of the light-emitting unit, thereby adjusting the voltage of the power supply terminal of all light-emitting units of the backlight unit.

[0088] When the voltage state of the backlight unit is stable, a hold command is generated to control the voltage conversion module and maintain the DC voltage connected to the power supply terminal of the light-emitting unit.

[0089] In the above technical method, the voltage of the output channel of an arbitrary number of driving units is obtained, and the current voltage state of each output channel is determined based on the voltage of each output channel. Then, the voltage state of each output channel from an arbitrary number of driving units is read by a dimming controller, and a voltage control strategy for the power supply of the light-emitting unit is determined based on the voltage state of each output channel, thereby more accurately adjusting the voltage of the power supply of the light-emitting unit.

[0090] As illustrated in FIG. 6, an embodiment of the present application provides a control device (200), and the control device (200) is,

[0091] A acquisition module (201) that acquires the voltage state of each output channel of an arbitrary number of driving units, wherein the voltage state includes an undervoltage state, an overvoltage state, and a stable state; and wherein the voltage state of each output channel of a driving unit is determined by the driving unit based on the voltage of the output channel within a preset time and the stable operating voltage range.

[0092] It includes a processing module (202) that adjusts the voltage of the power supply terminals of all light-emitting units of the backlight unit based on the voltage status of each output channel of any number of driving units.

[0093] In one embodiment, the processing module (202) specifically,

[0094] Statistically counting the number of output channels corresponding to each voltage state, and determining the voltage state of the backlight unit based on the number of output channels corresponding to each voltage state and the priority of each voltage state;

[0095] Based on the voltage status of the backlight unit, the voltage of the power supply terminals of all light-emitting units of the backlight unit is adjusted.

[0096] In one embodiment, the processing module (202) specifically,

[0097] When the number of output channels corresponding to a single voltage state is at its maximum, the voltage state in which the number of output channels is at its maximum is set as the voltage state of the backlight unit;

[0098] When the number of output channels corresponding to multiple voltage states is at its maximum, the one with the higher priority among the multiple voltage states with the maximum number of output channels is selected as the voltage state of the backlight unit;

[0099] or,

[0100] A state where the quantity of corresponding output channels in each voltage state satisfies a critical condition is set as the reserve voltage state; and the reserve voltage state with the highest priority is set as the voltage state of the backlight unit.

[0101] In one embodiment, the power supply terminals of all light-emitting units are connected to a common power terminal; and the processing module (202) is,

[0102] Based on the voltage status of the backlight unit, the voltage of the common power supply is adjusted to adjust the voltage of the power supply of all light-emitting units of the backlight unit.

[0103] In one embodiment, the display device further includes a voltage conversion module, and the voltage conversion module is connected to a common power supply; specifically, the processing module (202) is,

[0104] A control command is generated based on the voltage status of the backlight unit, and the control command is intended to adjust the voltage of the common power supply by controlling the voltage conversion module.

[0105] In one embodiment, the processing module (202) specifically,

[0106] Generates a step-down command when the voltage state of the backlight unit is in an overvoltage state; the step-down command is intended to control the voltage conversion module to lower the voltage of the common power supply;

[0107] A boost command is generated when the voltage state of the backlight unit is an undervoltage state; the boost command is intended to control the voltage conversion module to raise the voltage of the common power supply;

[0108] A hold command is generated when the voltage state of the backlight unit is in a stable state; here, the hold command is intended to control the voltage conversion module to maintain the voltage of the common power supply.

[0109] In one embodiment,

[0110] For each output channel, if the voltage of the output channel is greater than the phase boundary of the stable operating voltage range, the output channel is in an overvoltage state;

[0111] If the voltage of the output channel is lower than the lower boundary of the stable operating voltage range, the output channel is in an undervoltage state;

[0112] When the voltage of the output channel is within the stable operating voltage range, the output channel is in a stable state.

[0113] As illustrated in FIG. 7, one embodiment of the present application provides a dimming controller (500), and the dimming controller (500) includes a memory (501) and a processor (502).

[0114] Here, memory (501) stores computer instructions that the processor (502) can execute.

[0115] The processor (502) implements each step of the method of the above embodiment when executing computer instructions. Specifically, one may refer to the relevant description of the above-described method embodiment.

[0116] Optionally, the memory (501) may be configured individually or integrated with the processor (502). If the memory (501) is installed individually, the dimming controller further includes a bus connecting the memory (501) and the processor (502).

[0117] An embodiment of the present application further provides a computer-readable storage medium in which computer instructions are stored, and a processor implements each step of the method of the embodiment when executing computer instructions.

[0118] The embodiments of the present application further provide a computer program product comprising computer instructions that implement each step of the method of the embodiments when executed by a processor.

[0119] A person skilled in the art can readily conceive of other embodiments of this application after considering the specification and practicing the invention disclosed herein. The purpose of this application is to include all variations, uses, or adaptive modifications of this application, such variations, uses, or adaptive modifications follow the general principles of this application and include common sense or conventional technical means known in the art that are not disclosed in this application. The specification and embodiments are to be considered by way of example only, and the true scope and spirit of this application are set forth in the claims below.

[0120] It should be understood that the present application is not limited to the exact structure described above and illustrated in the drawings, and that various modifications and changes are possible without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

Claim 1 A control method, wherein the control method is applied to a dimming controller, and the display device includes a dimming controller and a backlight unit; each backlight unit includes multiple modules, each module includes multiple driving units and multiple light-emitting units, the multiple driving units represent an array distribution, each driving unit includes multiple output channels, one output channel of each driving unit is connected to a control terminal of one light-emitting unit, and each driving unit is connected to multiple light-emitting units, wherein the control method comprises the steps of: obtaining a voltage state of each output channel of an arbitrary number of driving units, wherein the voltage state includes an undervoltage state, an overvoltage state, and a stable state; wherein the voltage state of the output channel of the driving unit is determined by the driving unit based on the voltage of the output channel within a preset time and a stable operating voltage range; and adjusting the voltage of the power supply terminal of all light-emitting units of the backlight unit based on the voltage state of each output channel of the arbitrary number of driving units. Claim 2 A control method according to claim 1, wherein the step of adjusting the voltage of the power supply terminals of all light-emitting units of the backlight unit based on the voltage state of each output channel of the arbitrary number of driving units is specifically characterized by comprising: a step of statistically determining the number of output channels in the overvoltage state, statistically determining the number of output channels in the undervoltage state, and statistically determining the number of output channels in the stable state, and determining the voltage state of the backlight unit based on the number of output channels corresponding to each voltage state and the priority of each voltage state; and a step of adjusting the voltage of the power supply terminals of all light-emitting units of the backlight unit based on the voltage state of the backlight unit. Claim 3 A control method according to claim 2, wherein the step of determining the voltage state of the backlight unit based on the quantity of output channels corresponding to each voltage state and the priority of each voltage state specifically comprises: a step of making the voltage state in which the quantity of output channels corresponding to one voltage state is maximum the voltage state of the backlight unit when the quantity of output channels corresponding to one voltage state is maximum; a step of selecting the one with a higher priority among the multiple voltage states in which the quantity of output channels is maximum as the voltage state of the backlight unit when the quantity of output channels corresponding to multiple voltage states is maximum; making the quantity of output channels corresponding to each voltage state satisfy a critical condition a reserve voltage state; and making the reserve voltage state with the highest priority the voltage state of the backlight unit. Claim 4 A control method according to claim 2, wherein the power supply terminals of all light-emitting units are connected to a common power supply terminal; and the step of adjusting the voltage of the power supply terminals of all light-emitting units of the backlight unit based on the voltage state of the backlight unit specifically includes the step of adjusting the voltage of the common power supply terminal based on the voltage state of the backlight unit to adjust the voltage of the power supply terminals of all light-emitting units of the backlight unit. Claim 5 In claim 4, the display device further comprises a voltage conversion module, and the voltage conversion module is connected to a common power supply unit; the step of adjusting the voltage of the common power supply unit based on the voltage state of the backlight unit specifically comprises the step of generating an adjustment command based on the voltage state of the backlight unit, and the adjustment command is for controlling the voltage conversion module to adjust the voltage of the common power supply unit. Claim 6 A control method according to claim 5, wherein the step of generating a control command based on the voltage state of the backlight unit specifically comprises: generating a step of reducing the voltage when the voltage state of the backlight unit is in an overvoltage state, wherein the step of reducing the voltage is for controlling a voltage conversion module to lower the voltage of the common power supply; generating a step of increasing the voltage of the common power supply when the voltage state of the backlight unit is in an undervoltage state, wherein the step of increasing the voltage of the common power supply is for controlling a voltage conversion module; and generating a step of maintaining the voltage of the common power supply when the voltage state of the backlight unit is in a stable state, wherein the step of maintaining the voltage is for controlling a voltage conversion module to maintain the voltage of the common power supply. Claim 7 A control method according to claim 1, wherein for each output channel, if the voltage of the output channel is greater than the upper boundary of the stable operating voltage range, the output channel is in an overvoltage state; if the voltage of the output channel is less than the lower boundary of the stable operating voltage range, the output channel is in an undervoltage state; and if the voltage of the output channel is within the stable operating voltage range, the output channel is in a stable state. Claim 8 A dimming controller comprising a processor and a memory connected to the processor in communication; wherein the memory stores computer execution commands; and wherein the processor executes the computer execution commands stored in the memory to implement a control method according to any one of claims 1 to 7. Claim 9 A display device comprising a dimming controller and a backlight unit according to claim 8; wherein each backlight unit comprises a plurality of modules, each module comprises a plurality of driving units and a plurality of light-emitting units, and one output channel of each of the driving units is connected to a control terminal of one of the light-emitting units; and wherein each driving unit is also connected to the dimming controller. Claim 10 In claim 9, the display device further comprises a voltage conversion module, wherein the voltage conversion module is connected to the dimming controller, the voltage conversion module is also connected to a common power supply terminal, and the power supply terminals of all light-emitting units are connected to the common power supply terminal.

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