Display assembly and vehicle display assembly

Abstract

The invention provides a display assembly and a vehicle display assembly. The display assembly includes a display panel, a controller, a power supply circuit, and a control circuit. The controller drives the display panel. The controller is electrically connected with the display starting signal line and outputs a locking signal according to the indication of the display starting signal. And the locking signal changes along with whether the controller completes a power-off program or not. The power supply circuit controls whether to supply power to the controller according to the indication of the driving signal. The control circuit includes a first diode and a second diode. The first end of the first diode is electrically connected with a display starting signal line so as to receive a display starting signal. The second end of the first diode is electrically connected with the power supply circuit. The third end of the second diode is electrically connected with the controller so as to receive the locking signal. The fourth end of the second diode is electrically connected with the second end. The control circuit can output the driving signal according to the display enabling signal and the locking signal, so that the situation that the display assembly does not completely execute a power-off program to generate display abnormity is solved.

Description

Technical Field

[0001] This invention relates to a display assembly and an automotive display assembly. Background Technology

[0002] Currently, most in-vehicle displays are split-type, meaning the vehicle's main unit and the display screen are separate. To extend battery life, when the display screen enters sleep mode under the control of the vehicle's main unit, the display screen's controller can be powered down, thus saving power.

[0003] However, when the vehicle's main unit directly controls the power-off of the display screen, the controller often fails to complete the full power-off procedure before cutting off the power, which can easily cause display abnormalities such as screen flickering, distorted images, or erroneous touch operations. Summary of the Invention

[0004] At least one embodiment of the present invention provides a display assembly and an automotive display assembly.

[0005] The display assembly provided in at least one embodiment of the present invention includes a display panel, a controller, a power supply circuit, and a control circuit. The controller is electrically connected to the display panel to drive the display panel. The controller is electrically connected to a display enable signal line to receive a display enable signal and outputs a lock signal according to the indication of the display enable signal. The lock signal changes depending on whether the controller completes a power-down procedure. The power supply circuit is electrically connected to the controller and is controlled to supply power to the controller according to the indication of the drive signal. The control circuit includes a first diode and a second diode. A first terminal of the first diode is electrically connected to the display enable signal line to receive the display enable signal. A second terminal of the first diode is electrically connected to the power supply circuit. A third terminal of the second diode is electrically connected to the controller to receive the lock signal. A fourth terminal of the second diode is electrically connected to the power supply circuit. The control circuit outputs a drive signal according to the display enable signal and the lock signal.

[0006] In at least one embodiment of the present invention, when the display enable signal indicates a power-on command, the first diode is turned on. Based on the on state of the first diode, the control circuit outputs a drive signal indicating a drive command to control the power supply circuit to supply power to the controller. The controller outputs a lock signal indicating a power-on command based on the power-on command, and the lock signal is transmitted to the second diode, causing the second diode to turn on.

[0007] In at least one embodiment of the present invention, when the display enable signal indicates a power-down command, the first diode is not conducting, and the controller performs a power-down procedure according to the power-down command. When the controller completes the power-down procedure, the controller outputs a lock signal indicating completion of the power-down command, and the lock signal is transmitted to the second diode, causing the second diode to be de-conducted. Based on the fact that both the first and second diodes are de-conducting, the control circuit outputs a drive signal indicating a no-drive command, thereby controlling the power supply circuit to stop supplying power to the controller.

[0008] In at least one embodiment of the present invention, when the display enable signal indicates a power-down command, the first diode is not turned on, and the controller performs a power-down procedure according to the power-down command. During the period before the controller completes the power-down procedure, the controller outputs a lock signal indicating a power-on command, and the lock signal is transmitted to the second diode, causing the second diode to remain on. Based on the on state of the second diode, the control circuit outputs a drive signal indicating a drive command to control the power supply circuit to continue supplying power to the controller.

[0009] In at least one embodiment of the present invention, the display assembly further includes a system DC voltage source circuit. The system DC voltage source circuit provides a DC voltage. The power supply circuit includes a low-dropout regulator. The low-dropout regulator is electrically connected to the system DC voltage source circuit, the control circuit, and the controller. The low-dropout regulator is controlled, according to a drive signal, to convert the DC voltage into a supply voltage to power the controller.

[0010] In at least one embodiment of the present invention, the display assembly further includes a switching circuit. The switching circuit is electrically connected between the display enable signal line and the controller, and also electrically connected between the display enable signal line and the control circuit. The switching circuit is used to limit the voltage amplitude of the display enable signal within a voltage range.

[0011] In at least one embodiment of the present invention, the switching circuit includes a first transistor, a second transistor, and a voltage limiting circuit. The first transistor has a first terminal, a second terminal, and a third terminal. The first terminal is electrically connected to a low potential. The second terminal is electrically connected to a display enable signal line. The second transistor has a fourth terminal, a fifth terminal, and a sixth terminal. The fourth terminal is electrically connected to a high potential. The fifth terminal is electrically connected to the third terminal. The sixth terminal is electrically connected to a first terminal of a first diode. The voltage limiting circuit is electrically connected between the sixth terminal and the controller. The voltage limiting circuit is used to limit the voltage amplitude of the display enable signal within a voltage range.

[0012] In at least one embodiment of the present invention, the display assembly further includes a matching circuit. The matching circuit is electrically connected between the display enable signal line and the switching circuit. The matching circuit is used to adjust the voltage division ratio of the display enable signal to match the display assembly.

[0013] In at least one embodiment of the present invention, the matching circuit includes a first resistor and a second resistor. The first resistor has a first connection terminal and a second connection terminal. The first connection terminal is electrically connected to a display enable signal line. The second connection terminal is electrically connected to a switching circuit. The second resistor has a third connection terminal and a fourth connection terminal. The third connection terminal is electrically connected to the second connection terminal. The fourth connection terminal is grounded.

[0014] The automotive display assembly provided in at least one embodiment of the present invention includes a display panel, a controller, a power supply circuit, and a control circuit. The display panel is mounted on the vehicle body. The controller is electrically connected to the display panel to drive it. The controller is electrically connected to the display enable signal line of the vehicle's main unit to receive a display enable signal and output a lock signal according to the indication of the display enable signal. The lock signal changes depending on whether the controller completes a power-down procedure. The power supply circuit is electrically connected to the controller and is controlled to supply power to the controller according to the indication of the drive signal. The control circuit includes a first diode and a second diode. The first terminal of the first diode is electrically connected to the display enable signal line to receive the display enable signal. The second terminal of the first diode is electrically connected to the power supply circuit. The third terminal of the second diode is electrically connected to the controller to receive the lock signal. The fourth terminal of the second diode is electrically connected to the power supply circuit. The control circuit outputs a drive signal according to the display enable signal and the lock signal.

[0015] Based on the above, in the display assembly and automotive display assembly disclosed in the above embodiments, the control circuit uses a first diode and a second diode to form an "OR logic gate", so that the control circuit can control the power supply circuit to supply power to the controller according to whether the controller has completed the power-down procedure, thereby solving the problem of display abnormality caused by the display assembly not fully executing the power-down procedure. Attached Figure Description

[0016] To gain a more complete understanding of the embodiments and their advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, wherein:

[0017] Figure 1 This is a block diagram of a display assembly according to at least one embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Circuit diagrams of the control circuit, switching circuit, and matching circuit; and

[0019] Figure 3 yes Figure 1 The circuit diagram of the power supply circuit in the image.

[0020] In the attached figures, the following labels are used:

[0021] 100: Display Assembly

[0022] 110: Display panel

[0023] 120: Controller

[0024] 130: System DC voltage source circuit

[0025] 140: Power supply circuit

[0026] 150: Control Circuit

[0027] 160: Switching circuit

[0028] 161: Voltage limiting circuit

[0029] 170: Matching circuit

[0030] 200: Main unit of the vehicle body

[0031] C1, C2, C3, C4, C5, C6: Capacitors

[0032] D1: First diode

[0033] D11: First End

[0034] D12: Second end

[0035] D2: Second diode

[0036] D21: Third End

[0037] D22: Fourth End

[0038] D3, D4: Diodes

[0039] D31: Fifth End

[0040] D32: Sixth End

[0041] D41: Seventh End

[0042] D42: Eighth End

[0043] Q1: First transistor

[0044] Q11: First electrode

[0045] Q12: Second electrode

[0046] Q13: Third electrode

[0047] Q2: Second transistor

[0048] Q21: Fourth electrical electrode

[0049] Q22: Fifth electric pole

[0050] Q23: Sixth electric pole

[0051] R101, R102, R103, R104, R105, R106, R107, R108, R109, R110, R111, R112, R113, R114: Resistors

[0052] R110a: First connection end

[0053] R110b: Second connection terminal

[0054] R111a: Third connection terminal

[0055] R111b: Fourth connection terminal

[0056] U1: Low dropout voltage regulator

[0057] EN: Startup Terminal

[0058] OUT: Voltage output terminal

[0059] VIN: Voltage input terminal

[0060] Batt_FLT: DC voltage

[0061] Disp_EN: Displays the enabled signal line.

[0062] Disp_EN_DET: Displays that the detection line is enabled.

[0063] LDO_EN: Startup line

[0064] MCU_Power_Lock: Power Lock Line

[0065] Power_MCU: Controller power supply line Detailed Implementation

[0066] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0067] In the following text, to clearly present the technical features of this application, the dimensions (e.g., length, width, thickness, and depth) of the elements (e.g., layers, films, substrates, and regions) in the accompanying drawings will be enlarged proportionally, and the number of some elements may be reduced. Therefore, the description and explanation of the embodiments below are not limited to the number of elements in the drawings or the dimensions and shapes presented by the elements, but should cover dimensions, shapes, and deviations from both due to actual manufacturing processes and / or tolerances. For example, a flat surface shown in the drawings may have rough and / or non-linear characteristics, and an acute angle shown in the drawings may be rounded. Therefore, the elements presented in the accompanying drawings are primarily for illustrative purposes and are not intended to precisely depict the actual shape of the elements, nor are they intended to limit the claims of this application.

[0068] Secondly, the terms "approximately," "approximately," or "substantially" used in this case not only cover explicitly stated numerical values ​​and ranges, but also the permissible deviation range understood by someone skilled in the art to which this invention pertains. This deviation range can be determined by errors that occur during measurement, which may arise from limitations of the measurement system or process conditions. For example, two objects (such as the planes or traces of a substrate) are "substantially parallel" or "substantially perpendicular." "Substantially parallel" and "substantially perpendicular" respectively mean that the parallelism and perpendicularity between the two objects can include non-parallelism and non-perpendicularity caused by permissible deviation ranges.

[0069] Furthermore, "approximately" can mean within one or more standard deviations of the aforementioned values, such as ±30%, ±20%, ±10%, or ±5%. The use of terms such as "approximately," "approximately," or "substantially" in this text allows for the selection of an acceptable range of deviations or standard deviations based on optical, etched, mechanical, or other properties, and does not apply to all of the aforementioned optical, etched, mechanical, and other properties using a single standard deviation.

[0070] The spatial relative terms used in this invention, such as "below," "under," "above," and "above," are for the convenience of describing the relative relationship between one element or feature and another, as illustrated in the figures. The true meaning of these spatial relative terms includes other orientations. For example, when the illustration is rotated 180 degrees vertically, the relationship between one element and another may change from "below" or "under" to "above" or "above." Furthermore, the spatial relative descriptions used in this invention should be interpreted in the same way.

[0071] Furthermore, the present invention can be implemented or applied through other different specific embodiments, and the details of the present invention can also be combined, modified, and changed in various ways based on different viewpoints and applications without departing from the concept of the present invention. For clarity in illustrating the following embodiments, elements with the same or similar functions are represented by the same numbers.

[0072] Figure 1 This is a block diagram of a display assembly 100 according to at least one embodiment of the present invention. (See also...) Figure 1 The display assembly 100 includes a display panel 110, a controller 120, a system DC voltage source circuit 130, a power supply circuit 140, and a control circuit 150. The display assembly 100 can be applied to vehicle bodies, advertising billboards, medical equipment, industrial equipment, or other suitable electronic carriers without limitation. Figure 1 In the example, the display assembly 100 is mounted on the vehicle body (not shown), thus constituting a vehicle display assembly. The display assembly 100 can be electrically connected to the vehicle body host 200 and controlled by the vehicle body host 200.

[0073] Display panel 110 may be a liquid crystal display panel, but is not limited to this. Controller 120 is electrically connected to display panel 110 to drive display panel 110 to display images. Furthermore, controller 120 can also control the presentation mode of the content displayed on display panel 110, such as the brightness, color, or contrast of display panel 110. Further, controller 120 can also perform image processing control, such as the resolution or display mode of display panel 110. Controller 120 may be a microcontroller unit (MCU). System DC voltage source circuit 130 is used to provide DC voltage. Power supply circuit 140 is electrically connected to controller 120 and system DC voltage source circuit 130, and is used to convert the DC voltage provided by system DC voltage source circuit 130 into a supply voltage to power controller 120.

[0074] It is worth mentioning that the control circuit 150 can be electrically connected to the vehicle host 200, the controller 120, and the power supply circuit 140. The control circuit 150 can control the power supply circuit 140 according to the instructions of the vehicle host 200 and the controller 120, for example, in real time controlling whether the power supply circuit 140 converts DC voltage into a supply voltage to supply power to the controller 120.

[0075] Furthermore, the control circuit 150 can be configured as an OR logic gate. When the vehicle host 200 controls the display assembly 100 to power on, the control circuit 150 can control the power supply circuit 140 to supply power to the controller 120 upon receiving the power-on command from the vehicle host 200. When the vehicle host 200 controls the display assembly 100 to power off, the control circuit 150 can control the power supply circuit 140 to continue supplying power to the controller 120 while receiving the power-on command from the controller 120 before it has completed the power-off procedure. The control circuit 150 can only control the power supply circuit 140 to stop supplying power to the controller 120 upon receiving both the power-off command from the vehicle host 200 and the power-off completion command from the controller 120. In this way, the controller 120 can be de-energized before completing the power-off procedure, thereby resolving the situation where the display assembly 100 experiences display abnormalities due to incomplete execution of the power-off procedure.

[0076] Specifically, the display assembly 100 also includes a switching circuit 160 and a matching circuit 170. The switching circuit 160 is electrically connected between the vehicle host 200 and the controller 120, and between the vehicle host 200 and the control circuit 150. The switching circuit 160 is used to limit the voltage amplitude of the output signal of the vehicle host 200 within a stable voltage range, thereby preventing surges in the electrical signal output by the vehicle host 200. The matching circuit 170 is electrically connected between the vehicle host 200 and the switching circuit 160. The matching circuit 170 is used to adjust the voltage division ratio of the output signal of the vehicle host 200 to match the display assembly 100.

[0077] Figure 2 yes Figure 1 The circuit diagrams of the control circuit 150, the switching circuit 160, and the matching circuit 170 are shown. Figure 3 yes Figure 1 The circuit diagram of the power supply circuit 140 is shown below. (See also...) Figures 1 to 3 The vehicle body host 200 is electrically connected to the display assembly 100 via the display enable signal line Disp_EN. The display enable signal line Disp_EN is used to transmit the display enable signal output by the vehicle body host 200 to the display assembly 100.

[0078] like Figure 1 and Figure 2 As shown, the control circuit 150 may include a first diode D1, a second diode D2, and resistors R101, R102, and R103. The first diode D1 has a first terminal D11 and a second terminal D12. The first terminal D11 is electrically connected to the display enable signal line Disp_EN to receive the display enable signal. Specifically, the first terminal D11 can be electrically connected to the display enable signal line Disp_EN via the switching circuit 160 and the matching circuit 170. The second terminal D12 is electrically connected to the power supply circuit 140. Specifically, the second terminal D12 can be electrically connected to the start line LDO_EN via resistor R101, and is also electrically connected to the power supply circuit 140 via the start line LDO_EN.

[0079] The second diode D2 has a third terminal D21 and a fourth terminal D22. The third terminal D21 is electrically connected to the controller 120. Specifically, the third terminal D21 can be electrically connected to the controller 120 via the power lock line MCU_Power_Lock to receive the lock signal output by the controller 120. The fourth terminal D22 is electrically connected to the power supply circuit 140. Specifically, the fourth terminal D22 is electrically connected to the start line LDO_EN via resistor R102, and is also electrically connected to the power supply circuit 140 via the start line LDO_EN. In other words, the second terminal D12 and the fourth terminal D22 can be electrically connected to each other via resistors R101 and R102.

[0080] Resistor R103 is electrically connected between the startup line LDO_EN and ground. It is worth noting that the first terminal D11 of the first diode D1 and the third terminal D21 of the second diode D2 are anodes, while the second terminal D12 of the first diode D1 and the fourth terminal D22 of the second diode D2 are cathodes. Thus, the first diode D1 and the second diode D2 can form an OR logic gate.

[0081] The switching circuit 160 may include a first transistor Q1, a second transistor Q2, resistors R104, R105, R106, R107, and a voltage limiting circuit 161. The first transistor Q1 has a first terminal Q11, a second terminal Q12, and a third terminal Q13. The first terminal Q11 is electrically connected to a low potential, such as ground. The second terminal Q12 is electrically connected to the display enable signal line Disp_EN. Specifically, the second terminal Q12 may be electrically connected to the display enable signal line Disp_EN via a matching circuit 170.

[0082] The second transistor Q2 has a fourth terminal Q21, a fifth terminal Q22, and a sixth terminal Q23. The fourth terminal Q21 is electrically connected to a high potential, such as the DC voltage Batt_FLT provided by the system DC voltage source circuit 130. The fifth terminal Q22 is electrically connected to the third terminal Q13, for example, via resistor R104. Furthermore, a resistor R105 is electrically connected between the fourth terminal Q21 and the fifth terminal Q22. The sixth terminal Q23 is electrically connected to the first terminal D11 of the first diode D1 of the control circuit 150. Additionally, the sixth terminal Q23 can be electrically connected to the voltage limiting circuit 161 via parallel resistors R106 and R107.

[0083] It should be noted that the first transistor Q1 can be an NPN transistor, where the first terminal Q11, the second terminal Q12, and the third terminal Q13 correspond to the emitter, base, and collector, respectively; while the second transistor Q2 can be a PNP transistor, where the fourth terminal Q21, the fifth terminal Q22, and the sixth terminal Q23 correspond to the emitter, base, and collector, respectively, but is not limited to these types.

[0084] A voltage limiting circuit 161 is electrically connected between the sixth terminal Q23 and the controller 120. Specifically, the voltage limiting circuit 161 can be electrically connected to the controller 120 via the display enable detection line Disp_EN_DET. For example, the voltage limiting circuit 161 may include a capacitor C1, a diode D3, and resistors R108 and R109. The capacitor C1 is electrically connected between the parallel resistors R106 and R107 and ground. The diode D3 has a fifth terminal D31 and a sixth terminal D32. The fifth terminal D31 is grounded, while the sixth terminal D32 is electrically connected to the parallel resistors R106 and R107. It is worth mentioning that the diode D3 can be a Zener diode to stabilize the voltage, where the fifth terminal D31 and the sixth terminal D32 are the anode and cathode, respectively. Resistor R108 is connected in parallel with capacitor C1 and diode D3. Resistor R109 is electrically connected between resistor R108 and the display enable detection line Disp_EN_DET.

[0085] For example, the matching circuit 170 may include resistor R110 (first resistor) and resistor R111 (second resistor). Resistor R110 has a first terminal R110a and a second terminal R110b. The first terminal R110a is electrically connected to the display enable signal line Disp_EN. The second terminal R110b is electrically connected to the second terminal Q12 of the first transistor Q1 of the switching circuit 160. Resistor R111 has a third terminal R111a and a fourth terminal R111b. The third terminal R111a is electrically connected to the second terminal R110b. The fourth terminal R111b is grounded.

[0086] like Figure 1 and Figure 3 As shown, the power supply circuit 140 may include a low-dropout regulator U1, resistors R112, R113, R114, capacitors C2, C3, C4, C5, C6, and diode D4. The low-dropout regulator U1 may be electrically connected to the system DC voltage source circuit 130, the control circuit 150, and the controller 120, and is controlled to convert the DC voltage Batt_FLT provided by the system DC voltage source circuit 130 into a supply voltage to power the controller 120.

[0087] The low-dropout regulator U1 has a voltage input terminal VIN, a startup terminal EN, and a voltage output terminal OUT. The voltage input terminal VIN is electrically connected to the DC voltage Batt_FLT via resistor R112. Additionally, capacitors C2 and C3 are connected in parallel between the voltage input terminal VIN and ground. The startup terminal EN is electrically connected to the startup line LDO_EN via resistor R113, and is also electrically connected to the control circuit 150 via the startup line LDO_EN. Diode D4 has a seventh terminal D41 and an eighth terminal D42. The seventh terminal D41 is grounded, while the eighth terminal D42 is electrically connected to the startup line LDO_EN. It is worth noting that diode D4 can be a Zener diode to stabilize the voltage, where the seventh terminal D41 and the eighth terminal D42 are the anode and cathode, respectively.

[0088] Capacitor C4 is connected in parallel between the startup terminal EN and ground. The voltage output terminal OUT is electrically connected to the controller power supply line Power_MCU via resistor R114, and is also electrically connected to the controller 120 via the controller power supply line Power_MCU. Furthermore, capacitors C5 and C6 are connected in parallel between the voltage output terminal OUT and ground.

[0089] like Figures 1 to 3 As shown, when the vehicle host 200 transmits a display enable signal indicating a power-on command via the display enable signal line Disp_EN, for example, if the display enable signal is at a high level, the first transistor Q1 and the second transistor Q2 are turned on, causing the first diode D1 to turn on. Thus, the control circuit 150 outputs a drive signal indicating a drive command (e.g., a high level drive signal) based on the turned-on first diode D1, and transmits the drive signal to the power supply circuit 140 via the start line LDO_EN. In the power supply circuit 140, the low-dropout regulator U1 receives the high-level drive signal at its start terminal EN, and therefore outputs a supply voltage at its voltage output terminal OUT, supplying power to the controller 120 via the controller power supply line Power_MCU. After being powered on, the controller 120 can perform initialization settings.

[0090] On the other hand, when the first transistor Q1 and the second transistor Q2 are turned on, the display enable detection line Disp_EN_DET also receives a high-level signal (a display enable signal indicating a power-on command), thereby transmitting the high-level display enable signal to the controller 120. After receiving the high-level display enable signal, the controller 120 can output a lock signal indicating a power-on command, for example, a high-level lock signal, according to the power-on command. The high-level lock signal is transmitted to the second diode D2 of the control circuit 150 via the power lock line MCU_Power_Lock, causing the second diode D2 to conduct, thereby completing the power supply lock of the controller 120.

[0091] When the vehicle host 200 transmits a display enable signal indicating a power-down command via the display enable signal line Disp_EN, for example, if the display enable signal is at a low level, the first transistor Q1 and the second transistor Q2 are not turned on, causing the first diode D1 to also not turn on. The display enable detection line Disp_EN_DET also receives a low-level signal (the display enable signal indicating a power-down command), and thus transmits the low-level display enable signal to the controller 120. After receiving the low-level display enable signal, the controller 120 can perform a power-down procedure according to the power-down command. For example, the controller 120 stores data and closes each application program according to a timing sequence.

[0092] However, while the controller 120 is still processing the power-down procedure, it continues to output a lock signal indicating a power-on command, for example, a high-level lock signal. Therefore, the second diode D2 remains on. Consequently, the control circuit 150, based on the on-state second diode D2, continues to output a drive signal indicating a drive command (e.g., a high-level drive signal), and transmits the drive signal to the power supply circuit 140 via the startup line LDO_EN. Similarly, in the power supply circuit 140, the low-dropout regulator U1 continues to output the supply voltage at its voltage output terminal OUT, and continues to supply power to the controller 120 via the controller power supply line Power_MCU. Thus, the controller 120 can continue processing the power-down procedure without immediately shutting off power.

[0093] When controller 120 completes the power-down procedure, it outputs a lock signal indicating the completion of the power-down command, for example, a low-level lock signal. This low-level lock signal is transmitted to the second diode D2 of control circuit 150 via the power lock line MCU_Power_Lock, causing the second diode D2 to de-conduct. Thus, control circuit 150 outputs a drive signal indicating a no-drive command (the drive signal is low-level) based on the de-conducting first diode D1 and second diode D2, and transmits the drive signal to power supply circuit 140 via the start line LDO_EN. In power supply circuit 140, the start terminal EN of low-dropout regulator U1 receives the low-level drive signal, thus stopping the output of the supply voltage at voltage output terminal OUT. Controller 120 is then de-energized, thus completing the power-down process. As can be seen from the above, the lock signal can change depending on whether the controller 120 completes the power-down procedure, and the control circuit 150 can output a drive signal indicating a drive command or a non-drive command according to the display enable signal and the lock signal, thereby controlling whether the power supply circuit 140 supplies power to the controller 120.

[0094] In summary, in the display assembly disclosed in the above embodiments, the control circuit uses a first diode and a second diode to form an "OR logic gate," allowing the control circuit to control the power supply circuit to supply power to the controller based on whether the controller has completed the power-down procedure. This resolves the issue of display abnormalities caused by the display assembly not fully executing the power-down procedure. Furthermore, the use of the first and second diodes in the control circuit, in conjunction with either the voltage regulator circuit or the power supply circuit, not only simplifies the circuit and reduces its size but also saves on circuit material and manufacturing costs.

[0095] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A display assembly, characterized in that, Include: A display panel; A controller is electrically connected to the display panel to drive the display panel, wherein the controller is electrically connected to a display enable signal line to receive a display enable signal and output a lock signal according to the indication of the display enable signal, wherein the lock signal changes as the controller completes a power-off procedure; A power supply circuit, electrically connected to the controller, and controlled to supply power to the controller according to an indication of a drive signal; and A control circuit includes a first diode and a second diode, wherein a first terminal of the first diode is electrically connected to the display enable signal line to receive the display enable signal, a second terminal of the first diode is electrically connected to the power supply circuit, a third terminal of the second diode is electrically connected to the controller to receive the lock signal, and a fourth terminal of the second diode is electrically connected to the power supply circuit. The control circuit outputs the drive signal according to the display enable signal and the lock signal.

2. The display assembly as described in claim 1, characterized in that, When the display enable signal indicates a power-on command, the first diode is turned on; The control circuit outputs a drive signal indicating a drive command based on the state of the first diode being on, so as to control the power supply circuit to supply power to the controller; The controller outputs a lock signal indicating a power-on command according to the power-on command, and the lock signal is transmitted to the second diode, causing the second diode to conduct.

3. The display assembly as described in claim 2, characterized in that, When the display enable signal indicates a power-down command, the first diode is de-conducted, and the controller performs the power-down procedure according to the power-down command; When the controller completes the power-down procedure, the controller outputs a lock signal indicating the completion of the power-down command, and the lock signal is transmitted to the second diode, causing the second diode to de-conduct; The control circuit outputs a drive signal indicating a no-drive command based on the fact that both the first diode and the second diode are in a non-conducting state, so as to control the power supply circuit to stop supplying power to the controller.

4. The display assembly as described in claim 2, characterized in that, When the display enable signal indicates a power-down command, the first diode is de-conducted, and the controller performs the power-down procedure according to the power-down command; During the period when the controller has not completed the power-down procedure, the controller outputs the lock signal indicating the power-on command, and the lock signal is transmitted to the second diode, so that the second diode remains on. The control circuit outputs a drive signal indicating the drive command based on the state of the second diode being on, so as to control the power supply circuit to continue supplying power to the controller.

5. The display assembly as described in claim 1, characterized in that, Also includes: A system of DC voltage source circuits provides DC voltage; The power supply circuit mentioned above includes: A low-dropout regulator is electrically connected to the system's DC voltage source circuit, the control circuit, and the controller, wherein the low-dropout regulator is controlled, according to the indication of the drive signal, to convert the DC voltage into a supply voltage to supply power to the controller.

6. The display assembly as claimed in claim 1, characterized in that, Also includes: A switching circuit is electrically connected between the display enable signal line and the controller, and electrically connected between the display enable signal line and the control circuit, wherein the switching circuit is used to limit a voltage amplitude of the display enable signal within a voltage range.

7. The display assembly as claimed in claim 6, characterized in that, The switching circuit includes: A first transistor has a first terminal, a second terminal and a third terminal, wherein the first terminal is electrically connected to a low potential and the second terminal is electrically connected to the display enable signal line; A second transistor having a fourth terminal, a fifth terminal, and a sixth terminal, wherein the fourth terminal is electrically connected to a high potential, the fifth terminal is electrically connected to a third terminal, and the sixth terminal is electrically connected to the first terminal of the first diode; and A voltage limiting circuit is electrically connected between the sixth electrode and the controller, wherein the voltage limiting circuit is used to limit the voltage amplitude of the display enable signal within the voltage range.

8. The display assembly as claimed in claim 6, characterized in that, Also includes: A matching circuit is electrically connected between the display enable signal line and the switching circuit, wherein the matching circuit is used to adjust the voltage division ratio of the display enable signal to match the display assembly.

9. The display assembly as claimed in claim 8, characterized in that, The matching circuit includes: A first resistor has a first connection terminal and a second connection terminal, wherein the first connection terminal is electrically connected to the display enable signal line, and the second connection terminal is electrically connected to the switching circuit; and A second resistor has a third connection terminal and a fourth connection terminal, wherein the third connection terminal is electrically connected to the second connection terminal and the fourth connection terminal is grounded.

10. A vehicle display assembly, characterized in that, Include: A display panel is mounted on a vehicle body; A controller is electrically connected to the display panel to drive the display panel. The controller is electrically connected to a vehicle host via a display enable signal line to receive a display enable signal and output a locking signal according to the indication of the display enable signal. The locking signal changes depending on whether the controller completes a power-off procedure. A power supply circuit, electrically connected to the controller, and controlled to supply power to the controller according to an indication of a drive signal; and A control circuit includes a first diode and a second diode, wherein a first terminal of the first diode is electrically connected to the display enable signal line to receive the display enable signal, a second terminal of the first diode is electrically connected to the power supply circuit, a third terminal of the second diode is electrically connected to the controller to receive the lock signal, and a fourth terminal of the second diode is electrically connected to the power supply circuit. The control circuit outputs the drive signal according to the display enable signal and the lock signal.

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