US-12625747-B2 - Display apparatus comprising drive circuit and drive chip configured to drive light bead in light board

Abstract

The present application provides a drive chip, a drive circuit, a display apparatus, and a data communication method; where preset marking information of the drive chip can be set in the drive chip; the drive chip can be connected to at least one controller and at least one light bead; the at least one controller can be configured to send drive data to the drive chip based on the preset marking information of the drive chip, where the preset marking information can include an address of the drive chip; the drive chip can be electrically connected to the at least one light bead and can be configured to drive the at least one light bead according to the drive data.

Inventors

• Zhenhua Pang
• Suying WANG

Assignees

• HISENSE VISUAL TECHNOLOGY CO., LTD.

Dates

Publication Date

20260512

Application Date

20240617

Priority Date

20230321

Claims (19)

1. 1 . A drive chip applied in a drive circuit for providing backlight, wherein the drive chip has one piece of preset marking information; the drive chip is electrically connected to at least one controller, and the at least one controller is configured to send drive data to the drive chip based on the preset marking information of the drive chip; and the drive chip is electrically connected to at least one light bead and is configured to drive the at least one light bead according to the drive data, wherein the drive circuit comprises a plurality of drive units and a plurality of data lines, each drive unit comprises a plurality of drive groups connected in parallel, each drive group comprises a plurality of drive chips connected in series, and the drive chip is one drive chip in the plurality of drive chips; each drive group has one piece of preset marking information, the preset marking information of the drive chip is preset marking information of a drive group where the drive chip is located, and different drive groups in a same drive unit have different preset marking information; and the plurality of drive units correspond one-to-one with the plurality of data lines, and each drive unit is connected to the at least one controller through a corresponding data line.
2. 2 . The drive chip according to claim 1 , wherein the preset marking information of the drive chip comprises an address of the drive chip, the drive chip is arranged with an address pin, and the address pin is configured to set a physical address of the drive chip; and the at least one controller is further configured to send the drive data to the drive chip based on the address of the drive chip, and the address of the drive chip comprises the physical address of the drive chip.
3. 3 . The drive chip according to claim 2 , wherein the drive chip comprises: a plurality of functional pins, wherein each functional pin corresponds to a physical address, and physical addresses corresponding to different functional pins are different; and wherein the address pin is connected to a functional pin; and the physical address of the drive chip is a physical address corresponding to the functional pin.
4. 4 . The drive chip according to claim 2 , wherein the drive chip comprises: a sampling resistor, wherein a terminal of the sampling resistor receives a fixed voltage, and another terminal of the sampling resistor is connected to the address pin; and different resistance values of the sampling resistor correspond to different physical addresses; and a fixed resistor, wherein a terminal of the fixed resistor is connected to the another terminal of the sampling resistor, and another terminal of the fixed resistor is grounded.
5. 5 . The drive chip according to claim 1 , wherein the preset marking information of the drive chip comprises an address of the drive chip, and the drive chip comprises: an address marking circuit, wherein a control terminal and a first terminal of the address marking circuit are connected to the at least one controller and a second terminal of the address marking circuit is connected to an input pin of the drive chip; and the address marking circuit is configured to: receive address data from the control terminal of the address marking circuit, and when the address data comprises the address of the drive chip that is electrically connected to the address marking circuit, transmit drive data obtained by the first terminal of the address marking circuit to the drive chip.
6. 6 . The drive chip according to claim 5 , wherein the address marking circuit comprises at least one switch device, and the at least one switch device is connected in series; the address data comprises at least one address bit set according to an arrangement order of the at least one switch device; and a switch device of the at least one switch is configured to receive the drive data from a first terminal of the switch device, receive a corresponding address bit from a control terminal of the switch device, and output the drive data from a second terminal of the switch device when the switch device is on for conduction.
7. 7 . A drive circuit for providing backlight, comprising: a plurality of drive units and a plurality of data lines, wherein each drive unit comprises a plurality of drive groups, each drive group comprises a plurality of drive chips, and the plurality of drive chips comprise at least one first drive chip; each drive group has one piece of preset marking information, the at least one first drive chip has one piece of preset marking information, the preset marking information of the at least one first drive chip in a drive group is preset marking information of the drive group; and different drive groups in a same drive unit have different preset marking information; the plurality of drive units correspond one-to-one with the plurality of data lines, and each drive unit is connected to at least one controller through a corresponding data line; and the at least one controller is configured to send drive data to the drive group based on preset marking information of a drive group where a target drive chip is located, so that the target drive chip acquires corresponding drive data; and each drive chip of the drive group is connected to at least one light bead in a light board, the target drive chip is configured to drive the at least one light bead according to the drive data; and the light board comprises a plurality of light beads arranged in an array; wherein the plurality of drive chips in each drive group are connected in series, and the plurality of drive groups in each drive unit are connected in parallel.
8. 8 . The drive circuit according to claim 7 , wherein each drive group comprises a plurality of first drive chips; the plurality of the first drive chips in a same drive group have same preset marking information, each drive chip in the drive group is set with an internal address, and different drive chips in the same drive group have different internal addresses; and the at least one controller is configured to send drive data to a target drive chip according to preset marking information of a drive group where the target drive chip is located and an internal address of the target drive chip.
9. 9 . The drive circuit according to claim 8 , wherein the internal address of the drive chip is a serial address of the drive chip.
10. 10 . The drive circuit according to claim 7 , wherein each drive group corresponds to a row of light beads in the light board, and a different drive group corresponds to a different row; and each drive chip in each drive group is connected to at least one light bead in a row corresponding to the drive group.
11. 11 . The drive circuit according to claim 7 , wherein each drive group corresponds to a column of light beads in the light board, and a different drive group corresponds to a different column; and each drive chip in each drive group is connected to at least one light bead in a column corresponding to the drive group.
12. 12 . The drive circuit according to claim 7 , wherein a quantity of the drive groups in each drive unit is same, and preset marking information of a corresponding drive group in a different drive unit is same.
13. 13 . The drive circuit according to claim 7 , wherein each drive chip is connected to at least one light string in the light board, and each light string comprises at least one light bead connected in series; and wherein the at least one controller is further configured to: acquire a power supply voltage value of a respective light string at a predetermined current value; obtain a current-voltage relationship of the light string according to the predetermined current value and the power supply voltage value of the light string at the predetermined current value; wherein the current-voltage relationship of the light string represents a current value that flows through the light string when a different power supply voltage value is applied to the light string; and determine, based on the current-voltage relationship, a power supply voltage value corresponding to a target current value, and output a power supply voltage having a voltage value which is the power supply voltage value corresponding to the target current value, to the light string.
14. 14 . The drive circuit according to claim 13 , wherein the at least one controller is further configured to: acquire a present actual current value of the light string; wherein the actual current value is collected by a drive chip; determine a state of the light string based on the actual current value of the light string; wherein the state of the light string comprises an undervoltage state and an overvoltage state; the undervoltage state of the light string indicating that the actual current value flowing through the light string is lower than the predetermined current value; and the overvoltage state of the light string indicating that the actual current value flowing through the light string is not lower than the predetermined current value; based on that the light string is in the undervoltage state, regulate to increase a present power supply voltage value of the light string according to a predetermined step size, and return to execute a step of the acquiring of the present actual current value of the light string until the light string is in the overvoltage state; and use the present power supply voltage value of the light string as a power supply voltage value of the light string at the predetermined current value; and based on that the light string is in the overvoltage state, regulate to decrease the present power supply voltage value of the light string according to a predetermined step size, and return to execute a step of the acquiring of the present actual current value of the light string until the light string is in the undervoltage state; and use a power supply voltage value when the light string is in the overvoltage state last time as a power supply voltage value of the light string at the predetermined current value.
15. 15 . The drive circuit according to claim 14 , wherein the at least one controller is further configured to: compare the present actual current value of the light string with the predetermined current value, and generate a state value based on a comparison result and store the state value; wherein the state value being a first value indicates that the actual current value is lower than the predetermined current value; and the state value being a second value indicates that the actual current value is greater than the predetermined current value; and determine a present state of the light string based on the state value.
16. 16 . The drive circuit according to claim 14 , wherein each drive chip corresponds to at least one light string, a data input port of a first drive chip located in a first position in the plurality of drive chips is connected to the at least one controller; at least one of a data input port or a data output port of each drive chip is connected to an output terminal of an open drain module, and the open drain module is grounded; and wherein the at least one controller is further configured to: for each drive chip, directly connect a data input port of the drive chip to a data output port of the drive chip; for each drive chip, based on that a present state value of a light string corresponding to the drive chip is a first value, control the output terminal of the open drain module to output a first level; and based on that the present state value of the light string corresponding to the drive chip is a second value, control the output terminal of the open drain module to output a second level; and acquire an output level of the data input port of the first drive chip located in the first position; wherein based on that the output level is the first level, the light string is determined to be in the undervoltage state; based on that the output level is the second level, the light string is determined to be in the overvoltage state; and when output terminals of open drain modules corresponding to the plurality of driving chips all output the second levels, the data input port of the first drive chip located in the first position outputs the second level, otherwise, the first level is output.
17. 17 . The drive circuit according to claim 13 , wherein there are a plurality of predetermined current values; and the at least one controller is further configured to: use a curve fitting method to obtain the current-voltage relationship of the light string, based on corresponding different power supply voltage values of the light string at the plurality of predetermined current values.
18. 18 . The drive circuit according to claim 13 , wherein the at least one controller is further configured to: determine a parameter in a reference voltage-current formula of the light string according to the power supply voltage value of the light string at the predetermined current value; acquire the reference voltage-current formula of the light string based on a parameter in a voltage formula of the light string; and acquire a line loss voltage of the light string, and modify the reference voltage-current formula of the light string based on the line loss voltage of the light string, to determine the current-voltage relationship of the light string.
19. 19 . A display apparatus, comprising a drive circuit for providing backlight, a light board, and at least one controller; wherein the drive circuit comprises: a plurality of drive units and a plurality of data lines, wherein each drive unit comprises a plurality of drive groups, each drive group comprises a plurality of drive chips, and the plurality of drive chips comprise at least one first drive chip; each drive group has one piece of preset marking information, the at least one first drive chip has one piece of preset marking information, and the preset marking information of the at least one first drive chip in a drive group is preset marking information of the drive group; and different drive groups in a same drive unit have different preset marking information; the plurality of drive units correspond one-to-one with the plurality of data lines, and each drive unit is connected to the at least one controller through a corresponding data line; and the at least one controller is configured to send drive data to the drive group based on preset marking information of a drive group where a target drive chip is located, so that the target drive chip acquires corresponding drive data; and each drive chip of the drive group is connected to at least one light bead in the light board, the target drive chip is configured to drive the at least one light bead according to the drive data; and the light board comprises a plurality of light beads arranged in an array; wherein the plurality of drive chips in each drive group are connected in series, and the plurality of drive groups in each drive unit are connected in parallel.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is a continuation application of International Application No. PCT/CN2023/143672, filed on Dec. 29, 2023, which claims priority to: Chinese Patent Application No. 202310280055.1, filed on Mar. 21, 2023 to the China National Intellectual Property Administration; Chinese Patent Application No. 202310485739.5, filed on Apr. 28, 2023 to the China National Intellectual Property Administration; Chinese Patent Application No. 202310485752.0, filed on Apr. 28, 2023 to the China National Intellectual Property Administration; and Chinese Patent Application No. 202310532469.9, filed on May 11, 2023 to the China National Intellectual Property Administration. All of the above applications are hereby incorporated by reference in their entireties. TECHNICAL FIELD The present application relates to a drive chip, a drive circuit, a display apparatus, and a data communication method. BACKGROUND A display apparatus is an apparatus for displaying images and/or user interfaces. The display apparatus is usually equipped with at least one controller, a drive circuit, and a plurality of light strings for providing backlight. The drive circuit is connected to the at least one controller through a data line, the at least one controller sends drive data to the drive circuit through the data line, the drive circuit drives a light string connected to it according to the drive data. Currently, it has become a research hotspot to reduce the quantity of the data lines in the display apparatus. SUMMARY Embodiments of the present application provide a drive chip, where preset marking information of the drive chip can be set in the drive chip, and the preset marking information can include an address of the drive chip; the drive chip can be electrically connected to at least one controller, and the at least one controller can be configured to send drive data to the drive chip based on the preset marking information of the drive chip; the drive chip can be electrically connected to at least one light bead and can be configured to drive the at least one light bead according to the drive data. The embodiments of the present application further provide a drive circuit, where the drive circuit can include a plurality of drive units and a plurality of data lines, each drive unit can include a plurality of drive groups, each drive group can include at least one drive chip, the at least one drive chip comprises at least one first drive chip; each drive group has one piece of preset marking information, the preset marking information of the at least one first drive chip in the drive group may be preset marking information of the drive group; different drive groups in a same drive unit have different preset marking information, the preset marking information of the at least one first drive chip is set in the at least one first drive chip; the plurality of drive units can correspond one-to-one with the plurality of data lines, each drive unit can be connected to at least one controller through a corresponding data line; the at least one controller can be configured to send drive data to the drive group based on preset marking information of a drive group where a target drive chip is located, so that the target drive chip can acquire corresponding drive data; each drive chip of the drive group can be connected to at least one light bead in a light board, the target drive chip can be configured to drive the at least one light bead according to the drive data; and the light board can include a plurality of light beads arranged in an array. The embodiments of the present application further provide a display apparatus, where the display apparatus can include a drive circuit, a light board, and at least one controller mentioned above. The embodiments of the present application further provide a data communication method, where the method is for an electronic device, the electronic device can include at least one controller, the at least one controller can be connected to a drive circuit of a display apparatus through a plurality of data lines, the drive circuit can include a plurality of drive units, each drive unit can include a plurality of drive groups, each drive group has one piece of preset marking information, each drive group can include at least one drive chip; where the plurality of data lines can correspond one-to-one with the plurality of drive units, each drive unit can be connected to the at least one controller through a corresponding data line, all drive groups in each drive unit can be connected to the data line corresponding to the drive unit; the method can include: generating, for each drive unit, drive data of the drive unit; where the drive data of the drive unit can include drive data of a respective drive group in the drive unit, drive data of each drive group can include preset marking information of the drive group; and sending, through the data lines corresponding to the plur