Head-up display device and temperature control method of head-up display device

Abstract

The invention discloses a head-up display device and a temperature control method of the head-up display device. The head-up display device can be prevented from being damaged due to irradiation of ambient light beams. The head-up display device comprises a display unit, a reflection assembly, at least one temperature sensor and a processing unit. The display unit is used for providing image light beams. The reflection assembly is arranged on a transmission path of the image light beam and has an opening state and a closing state. The at least one temperature sensor is arranged on the reflection assembly and used for sensing the reflection assembly to obtain at least one temperature. The processing unit is electrically connected with the display unit, the reflection assembly and the at least one temperature sensor, and is used for periodically controlling the at least one temperature sensor to sense and obtain at least one temperature of the at least one temperature sensor. When the maximum value of the at least one temperature is larger than the first threshold value, the processing unit is used for enabling the display unit to reduce the intensity of the image light beam and / or enabling the reflection assembly to be in a closed state.

Description

TECHNICAL FIELD

[0001] The present application relates to an electronic device and a temperature control method, and particularly relates to a head-up display device and a temperature control method of a head-up display device. BACKGROUND

[0002] The development of display technology in recent years has led to various head-up display devices being widely used in life. Head-up display devices are often used in airplanes, vehicles, store windows, etc. For example, a head-up display device for a vehicle uses the inner surface of the windshield as an optical combiner to provide information for the driver. The driver can see the information provided by the vehicle information system without looking down at the instrument panel or navigator while driving.

[0003] Since head-up display devices are mostly used in outdoor environments, sunlight can pass through the imaging lens group of the head-up display device and converge on the internal display unit, causing the temperature of the display unit to be higher than the upper limit that the display unit can withstand, thereby causing damage to the display unit and reducing the service life of the head-up display device.

[0004] The background section is used to help understand the content of the present application, so the content disclosed in the background section may include some known technologies that do not constitute the known technologies known to those skilled in the art. The content disclosed in the background section does not represent that the content or the problems to be solved by one or more embodiments of the present application have been known or recognized by those skilled in the art before the present application is filed. SUMMARY

[0005] The present application provides a head-up display device and a temperature control method of a head-up display device, which can avoid damage to the head-up display device caused by the irradiation of ambient light beams.

[0006] The present application provides a head-up display device and a temperature control method of a head-up display device, which can avoid damage to the head-up display device caused by the irradiation of ambient light beams.

[0007] To achieve one or some or all of the above-mentioned objects, an embodiment of the present application provides a head-up display device. The head-up display device comprises a display unit, a reflection assembly, at least one temperature sensor, and a processing unit. The display unit is configured to provide an image beam. The reflection assembly is disposed in a transmission path of the image beam and has an open state and a closed state. The at least one temperature sensor is disposed on the reflection assembly and is configured to sense the reflection assembly to obtain at least one temperature. The processing unit is electrically connected to the display unit, the reflection assembly, and the at least one temperature sensor, and is configured to periodically control the at least one temperature sensor to sense and obtain the at least one temperature. When a maximum value of the at least one temperature is greater than a first threshold value, the processing unit is configured to cause the display unit to reduce an intensity of the image beam and / or cause the reflection assembly to be in the closed state. When the maximum value of the at least one temperature is less than or equal to the first threshold value, the processing unit is configured to cause the display unit to increase the intensity of the image beam and / or cause the reflection assembly to be in the open state.

[0008] To achieve one or some or all of the above-mentioned objects, an embodiment of the present application provides a head-up display device. The head-up display device comprises a display unit, a reflection assembly, at least one temperature sensor, and a processing unit. The display unit is configured to provide an image beam. The reflection assembly is disposed in a transmission path of the image beam and has an open state and a closed state. The at least one temperature sensor is disposed on the reflection assembly and is configured to sense the reflection assembly to obtain at least one temperature. The processing unit is electrically connected to the display unit, the reflection assembly, and the at least one temperature sensor, and is configured to periodically control the at least one temperature sensor to sense and obtain the at least one temperature. When a maximum value of the at least one temperature is greater than a first threshold value, the processing unit is configured to cause the display unit to reduce an intensity of the image beam and / or cause the reflection assembly to be in the closed state. When the maximum value of the at least one temperature is less than or equal to the first threshold value, the processing unit is configured to cause the display unit to increase the intensity of the image beam and / or cause the reflection assembly to be in the open state.

[0009] Based on the above, in the head-up display device and the temperature control method of the head-up display device of an embodiment of the present application, the head-up display device can effectively detect whether the ambient light beam is incident on the display unit by the control of the processing unit on the display unit, the reflection assembly, and the at least one temperature sensor, and correspondingly adjust the intensity of the image beam and / or adjust the state of the reflection assembly, so as to avoid damage to the head-up display device caused by irradiation of a large amount of ambient light beams.

[0010] In order to make the above features and advantages of the present application more apparent, specific embodiments are described below in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a schematic structural diagram of a head-up display device of an embodiment of the present application.

[0012] Figure 2 yes Figure 1 A structural diagram of a head-up display device.

[0013] Figures 3A to 3C and Figures 4A to 4C They are Figure 2 A top-view schematic diagram showing the corresponding positions of the light spot distribution formed by the reflective components and display unit after being illuminated by ambient light.

[0014] Figure 5 This is a schematic flowchart of a temperature control method for a head-up display device according to an embodiment of the present invention.

[0015] Figure 6A and Figure 6B yes Figure 1 A schematic diagram of the optical path of another head-up display device when illuminated by an ambient light beam.

[0016] Explanation of reference numerals in the attached figures:

[0017] 100, 600: Head-up display device

[0018] 110: Processing Unit

[0019] 120, 620: Display Units

[0020] 121: Light Source Module

[0021] 122, 622: Optical modulation modules

[0022] 130: Reflective component

[0023] 131: Reflector

[0024] 131A: First Mirror

[0025] 131B: Second mirror

[0026] 132: Drive unit

[0027] 140: Temperature sensor

[0028] 150: Ambient temperature sensor

[0029] 622: Optical Modulation Module

[0030] 623: Diffuser plate

[0031] 624: Lens Module

[0032] IL: Image Beam

[0033] IM: Images

[0034] S00, S110, S120, S130, S140, S141, S142, S143, S144, S145, S150, S151, S152, S153: step

[0035] SL: ambient light beam

[0036] V: viewer

[0037] WS: windshield DETAILED DESCRIPTION

[0038] The foregoing and other technical features, aspects and effects of the present application will become more apparent from the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms used in the following description, such as upper, lower, left, right, front or rear, etc., are only intended to refer to the directions of the accompanying drawings. Thus, the directional terms are used for explanation and not for limitation of the present application.

[0039] Figure 1 is a schematic diagram of the architecture of a head-up display device according to an embodiment of the present application. Figure 2 is a schematic diagram of the architecture of a head-up display device according to an embodiment of the present application. Figure 1 is a schematic diagram of the architecture of a head-up display device according to an embodiment of the present application. Figure 1In the present embodiment, the head-up display device 100 comprises a processing unit 110, a display unit 120, a reflection assembly 130, and at least one temperature sensor 140. For example, in the present embodiment, the processing unit 110 can comprise one or more processors, such as a central processing unit (CPU), or other programmable general purpose or special purpose micro control unit (MCU), microprocessor, digital signal processor (DSP), programmable controller, application specific integrated circuit (ASIC), arithmetic logic unit (ALU), complex programmable logic device (CPLD), field programmable gate array (FPGA), or other similar element or combination thereof. In one embodiment, the functions of the processing unit 110 can be implemented as a plurality of program codes. The program codes can be stored in a memory and executed by the processing unit 110. Alternatively, in one embodiment, the functions of the processing unit 110 can be implemented as one or more circuits. The present disclosure does not limit the manner in which the functions of the processing unit 110 are implemented, whether by software or hardware.

[0040] As Figure 1As shown, in this embodiment, the display unit 120 is used to provide an image beam IL. The display unit 120 includes a light source module 121 and a light modulation module 122. In this embodiment, the light modulation module 122 is, for example, a display panel. The light source module 121 is used to provide an illumination beam (not shown), and the light modulation module 122 is disposed on the transmission path of the illumination beam to convert the illumination beam into an image beam IL. For example, in this embodiment, the light source module 121 may include elements such as a light source, wherein the light source may be a light emitting diode (LED) or a laser diode (LD) or a combination thereof. In this embodiment, the light modulation module 122 may be, for example, a liquid crystal panel, a liquid crystal on silicon display panel, an electro-optic modulator, a magneto-optic modulator, or an acousto-optic modulator (AOM). In other embodiments, the optical modulation module 122 may be a digital micromirror device (DMD).

[0041] like Figure 1 As shown, the image beam IL leaving the display unit 120 can be reflected to the windshield WS by the reflective component 130. The windshield WS can reflect the image beam IL into the viewer V's field of vision, displaying a virtual image in front of the viewer V's eyes. For example, the viewer V can observe the virtual image formed by the image beam IL, such as image IM, on the side of the windshield WS away from the viewer V (e.g., outside the vehicle). Image IM can be driving information, road condition information, or other information, and the present invention is not limited thereto.

[0042] The reflective component 130 is disposed on the transmission path of the image beam IL and has an on state and an off state. Specifically, in this embodiment, the reflective component 130 includes at least one reflector 131 and at least one drive member 132. At least one temperature sensor 140 is disposed on the reflective component 130 for sensing the reflective component 130 to obtain at least one temperature. In this embodiment, the at least one reflector 131 includes a plurality of reflectors 131, and the at least one temperature sensor 140 is disposed on the surface of one of the plurality of reflectors 131 facing away from the display unit 120. For example, such as Figure 1As shown, in the present embodiment, the at least one mirror 131 includes a first mirror 131 A and a second mirror 131B, and the second mirror 131B is located between the first mirror 131A and the display unit 120 in the transmission path of the image light beam IL. The at least one temperature sensor 140 is disposed on the first mirror 131A or the second mirror 131B. The at least one temperature sensor 140 can be a thermal sensor or a thermistor.

[0043] The driving member 132, for example, can be a motor, and is coupled to at least one of the first mirror 131A and the second mirror 131B through a plurality of gears, a slide rail, or a connecting rod (not shown) to control the reciprocating motion or rotation of the first mirror 131A and / or the second mirror 131B, so that the motion of the first mirror 131A and / or the second mirror 131B can change the transmission direction of the image light beam IL to adjust the position of the image IM viewed by the viewer V or to make the image IM unable to be imaged. In an embodiment, the first mirror 131A and the second mirror 131B can be one of a plane mirror, a convex mirror, and a concave mirror, respectively. In Figure 1 In the present embodiment, the driving member 132 is disposed on the second mirror 131B, the first mirror 131A is a concave mirror, and the second mirror 131B is a plane mirror. In other embodiments, the number of the driving member 132 and the first mirror 131A and the second mirror 131B can be adjusted according to actual needs, for example, corresponding driving members 132 are disposed on the first mirror 131A and the second mirror 131B, or the same driving member 132 is used to control the first mirror 131A and the second mirror 131B, or the driving member 132 is disposed only on the first mirror 131A, or the driving member 132 is disposed only on the second mirror 131B. In the present embodiment, when the reflection assembly 130 is in the open state, the first mirror 131A and the second mirror 131B can be used to form a specific light path for the image light beam IL, and the image light beam IL can form a virtual image in front of the eyes of the viewer V. When the reflection assembly 130 is in the closed state, for example, when the driving member 132 changes the rotation angle or position of the first mirror 131A and / or the second mirror 131B, the light path of the image light beam IL is changed, and the image light beam IL cannot form a virtual image in front of the eyes of the viewer V.

[0044] In the present embodiment, the at least one temperature sensor 140 is a plurality of temperature sensors 140, and the plurality of temperature sensors 140 are disposed on the center and the corner portions around one of the plurality of mirrors 131 (as shown, the nine temperature sensors 140 are evenly distributed on the back surface of the second mirror 131B). As shown, the plurality of temperature sensors 140 are disposed on the back surface of the second mirror 131B. Figure 2 As shown, the plurality of temperature sensors 140 are disposed on the back surface of the second mirror 131B. Figure 1As shown, when an ambient light beam SL (e.g., sunlight) enters the windshield at a specific angle, it travels along a specific light path to the light modulation module 122 in the display unit 120. Furthermore, when the ambient light beam SL is too bright, for example, when the ambient light beam SL in the environment where the viewer V or the vehicle is located is too bright, the ambient light beam SL, after passing through the windshield SW, may be reflected by the first mirror 131A and / or the second mirror 131B to the light modulation module 122 in the display unit 120. After continuous irradiation by the ambient light beam SL, the temperature of the light modulation module 122 in the display unit 120 will rise. When the temperature rises above the operating temperature specification of the light modulation module 122 in the display unit 120, the display unit 120 may shut down, its components may be damaged, or it may suffer permanent damage.

[0045] On the other hand, since the ambient light beam SL also passes through multiple mirrors 131 of the reflective component 130 in the specific optical path of the image beam IL forming the image IM, at least one temperature sensor 140 can be provided on one of the multiple mirrors 131 to measure the temperature change of the mirror 131 of the reflective component 130, thereby determining whether the ambient light beam SL is illuminating the mirror 131 of the reflective component 130. Furthermore, since providing the temperature sensor 140 on the reflective surface of the mirror 131 would affect the imaging, the temperature sensor 140 is provided on the back side of the mirror 131. More specifically, each mirror 131 includes a substrate, and the temperature sensor 140 can be provided on the back side of the substrate (the side facing away from the light), while the side of the substrate facing the light is coated with a reflective layer or polished into a mirror surface to form the reflective surface of each mirror 131. Furthermore, when the multiple reflectors 131 of the reflective assembly 130 are irradiated by the ambient light beam SL, they absorb some energy and conduct the generated heat to their back side. Therefore, the temperature change of the reflectors 131 of the reflective assembly 130 can be known by the temperature sensor 140 located on the back side of the reflector 131, and thus it can be determined whether the ambient light beam SL has been incident on the light modulation module 122 in the display unit 120.

[0046] Figures 3A to 3C and Figures 4A to 4C They are Figure 2 A top view schematic diagram showing the corresponding positions of the light spot distribution formed by the reflective component 130 and the display unit 120 after being irradiated by the ambient light beam SL. Furthermore, since the ambient light beam SL irradiating the display unit 120 is transmitted from the reflective component 130, therefore, as... Figures 3A to 3C and Figures 4A to 4CAs shown, in this embodiment, the light spot distribution formed by the reflective component 130 and the display unit 120 after being irradiated by the ambient light beam SL has a corresponding positional relationship, and the temperature changes of the reflective component 130 and the display unit 120 after being irradiated by the ambient light beam SL are also correlated. Therefore, the temperature of the current display unit 120 can be estimated by the temperature measured by the reflector 131 of the reflective component 130.

[0047] like Figure 1 As shown, in this embodiment, the head-up display device 100 also includes an ambient temperature sensor 150. The processing unit 110 is electrically connected to at least one temperature sensor 140 and the ambient temperature sensor 150, and the processing unit 110 is used to periodically control the at least one temperature sensor 140 to sense and obtain at least one temperature, and to periodically control the ambient temperature sensor 150 to obtain the ambient temperature. Furthermore, in this embodiment, the processing unit 110 can obtain a first threshold based on the ambient temperature and a reference temperature of the display unit 120, wherein the reference temperature of the display unit 120 is, for example, the stable temperature of the display unit 120 when used for a long time without sunlight. This stable temperature can be obtained through previous experiments, and the relevant value is recorded and stored in the processing unit 110. For example, the first threshold can be obtained by multiplying the difference between the current ambient temperature and the reference temperature of the display unit 120 by a temperature correlation coefficient (relative heat capacity calculation value C) between the display unit 120 and the reflective component 130, and then adding the ambient temperature value. Furthermore, in this embodiment, the first threshold T1 can be obtained based on the calculation of Equation 1 below.

[0048]

[0049] Where T1 is the first threshold, T ref For the reference temperature of display unit 120, T a C represents the ambient temperature, and C is a parameter indicating the temperature correlation between the display unit 120 and the reflective component 130. Its physical meaning is the relative heat capacity calculation value. This parameter (relative heat capacity calculation value C) of the temperature correlation between the display unit 120 and the reflective component 130 can also be obtained through previous experiments. The relevant numerical records of different product specifications can be stored in the processing unit 110 for use in providing the processing unit 110 with the calculation processing of the first threshold.

[0050] On the other hand, in the present embodiment, the processing unit 110 can also obtain the second threshold value based on the ambient temperature and a specification temperature of the display unit 120, wherein the specification temperature of the display unit 120 is the maximum operating temperature allowed by the display unit 120, and the specification temperature can also be obtained according to the relevant value recorded in the product specification stored in the processing unit 110. Moreover, the specific calculation of the second threshold value can also be obtained based on the difference between the ambient temperature and the specification temperature of the display unit 120 multiplied by the temperature correlation (relative heat capacity calculation value C) coefficient of the display unit 120 and the reflective component 130, and then added to the value of the ambient temperature. Similarly, in the present embodiment, the second threshold value can also be obtained based on the calculation of the following formula 2.

[0051]

[0052] wherein T2 is the second threshold value, T spec is the specification temperature of the display unit 120, and the meanings of the remaining parameters are the same as those in formula 1, which will not be described herein.

[0053] In the present embodiment, since the specification temperature of the display unit 120 is the maximum operating temperature allowed by the display unit 120, the second threshold value is greater than the first threshold value. The specification temperature of the display unit 120 is, for example, 10℃ higher than the reference temperature of the display unit 120. In the embodiment without using the ambient temperature sensor 150, the first threshold value and the second threshold value can also be parameters stored in the processing unit 110 or in the storage medium coupled to the processing unit 110, and the processing unit 110 can directly read the first threshold value and the second threshold value without detecting the ambient temperature.

[0054] In this way, when the light modulation module 122 is irradiated by the ambient light beam SL to cause the temperature of the light modulation module 122 to be too high, or the light modulation module 122 is overheated due to the increase of the ambient temperature, the maximum value of the plurality of temperatures sensed by the plurality of temperature sensors 140 is greater than the first threshold value or the second threshold value, at which time the intensity of the image light beam IL can be controlled and reduced by the processing unit 110 to reduce the temperature of the light modulation module 122. Specifically, the method of reducing the intensity of the image light beam IL, for example, is to reduce the driving current, driving voltage or luminous power of the light source module 121 to reduce the intensity of the illumination light beam of the light source module 121, thereby reducing the intensity of the image light beam IL and reducing the heat absorbed by the light modulation module 122 to facilitate heat dissipation and cooling of the light modulation module 122.

[0055] The flow steps of the temperature control method of the head-up display device 100 will be further described below in conjunction with Figure 5

[0056] Figure 5 ​is a flowchart of a temperature control method of a head-up display device 100 according to an embodiment of the present disclosure. For example, Figure 1 As shown in FIG. 1, the head-up display device 100 can be used to perform the temperature control method of the head-up display device 100 to avoid the head-up display device 100 from being damaged due to the irradiation of the ambient light beam SL, but the present disclosure is not limited thereto. Specifically, as shown in FIG. 1, in the present embodiment, the processing unit 110 of the head-up display device 100, which is electrically connected with the display unit 120, the reflection assembly 130, at least one driving member 132, and at least one temperature sensor 140, can be used to perform the following steps. Figure 2 As shown in FIG. 1, the head-up display device 100 can be used to perform the temperature control method of the head-up display device 100 to avoid the head-up display device 100 from being damaged due to the irradiation of the ambient light beam SL, but the present disclosure is not limited thereto. Specifically, as shown in FIG. 1, in the present embodiment, the processing unit 110 of the head-up display device 100, which is electrically connected with the display unit 120, the reflection assembly 130, at least one driving member 132, and at least one temperature sensor 140, can be used to perform the following steps. Figure 5 As shown in FIG. 1, the head-up display device 100 can be used to perform the temperature control method of the head-up display device 100 to avoid the head-up display device 100 from being damaged due to the irradiation of the ambient light beam SL, but the present disclosure is not limited thereto. Specifically, as shown in FIG. 1, in the present embodiment, the processing unit 110 of the head-up display device 100, which is electrically connected with the display unit 120, the reflection assembly 130, at least one driving member 132, and at least one temperature sensor 140, can be used to perform the following steps. Figure 5 As shown in FIG. 1, the head-up display device 100 can be used to perform the temperature control method of the head-up display device 100 to avoid the head-up display device 100 from being damaged due to the irradiation of the ambient light beam SL, but the present disclosure is not limited thereto. Specifically, as shown in FIG. 1, in the present embodiment, the processing unit 110 of the head-up display device 100, which is electrically connected with the display unit 120, the reflection assembly 130, at least one driving member 132, and at least one temperature sensor 140, can be used to perform the following steps. As shown in FIG. 1, the head-up display device 100 can be used to perform the temperature control method of the head-up display device 100 to avoid the head-up display device 100 from being damaged due to the irradiation of the ambient light beam SL, but the present disclosure is not limited thereto. Specifically, as shown in FIG. 1, in the present embodiment, the processing unit 110 of the head-up display device 100, which is electrically connected with the display unit 120, the reflection assembly 130, at least one driving member 132, and at least one temperature sensor 140, can be used to perform the following steps.

[0057] As shown in FIG. 1, the head-up display device 100 can be used to perform the temperature control method of the head-up display device 100 to avoid the head-up display device 100 from being damaged due to the irradiation of the ambient light beam SL, but the present disclosure is not limited thereto. Specifically, as shown in FIG. 1, in the present embodiment, the processing unit 110 of the head-up display device 100, which is electrically connected with the display unit 120, the reflection assembly 130, at least one driving member 132, and at least one temperature sensor 140, can be used to perform the following steps. Figure 5 As shown in FIG. 1, the head-up display device 100 can be used to perform the temperature control method of the head-up display device 100 to avoid the head-up display device 100 from being damaged due to the irradiation of the ambient light beam SL, but the present disclosure is not limited thereto. Specifically, as shown in FIG. 1, in the present embodiment, the processing unit 110 of the head-up display device 100, which is electrically connected with the display unit 120, the reflection assembly 130, at least one driving member 132, and at least one temperature sensor 140, can be used to perform the following steps. As shown in FIG. 1, the head-up display device 100 can be used to perform the temperature control method of the head-up display device 100 to avoid the head-up display device 100 from being damaged due to the irradiation of the ambient light beam SL, but the present disclosure is not limited thereto. Specifically, as shown in FIG. 1, in the present embodiment, the processing unit 110 of the head-up display device 100, which is electrically connected with the display unit 120, the reflection assembly 130, at least one driving member 132, and at least one temperature sensor 140, can be used to perform the following steps.

[0058] As shown in FIG. 1, the head-up display device 100 can be used to perform the temperature control method of the head-up display device 100 to avoid the head-up display device 100 from being damaged due to the irradiation of the ambient light beam SL, but the present disclosure is not limited thereto. Specifically, as shown in FIG. 1, in the present embodiment, the processing unit 110 of the head-up display device 100, which is electrically connected with the display unit 120, the reflection assembly 130, at least one driving member 132, and at least one temperature sensor 140, can be used to perform the following steps.

[0059] Then, the processing unit 110 performs step S143 to determine whether the intensity of the image light beam IL has been reduced to 0. When the intensity of the image light beam IL has not been reduced to 0, the processing unit 110 performs step S00 to wait for a period of time and then returns to perform step S110. When the intensity of the image light beam IL has been reduced to 0, the processing unit 110 performs step S144 to cause the display unit 120 to display a warning sign of over-temperature to inform the viewer V, and then the processing unit 110 performs step S145 to cause the at least one driving member 132 to drive the at least one mirror 131 so that the reflection assembly 130 is in the closed state. Specifically, in the present embodiment, the method of causing the at least one driving member 132 to drive the at least one mirror 131 can be to change the rotation angle or position of the first mirror 131 A and / or the second mirror 131B. In other embodiments, the driving mode of the at least one driving member 132 to control the reflection assembly 130 can also be different depending on the position where the temperature sensor 140 is arranged. For example, when the temperature sensor 140 is arranged on the second mirror 131B, the at least one driving member 132 can switch the open state or the closed state of the reflection assembly 130 by changing the rotation angle or position of either of the first mirror 131 A and the second mirror 131B. When the temperature sensor 140 is arranged on the first mirror 131 A, the at least one driving member 132 can switch the open state or the closed state of the reflection assembly 130 by changing the rotation angle or position of the first mirror 131 A only.

[0060] On the other hand, after performing step S140, when the maximum value of the at least one temperature is greater than the second threshold value, the processing unit 110 performs step S142 to cause the display unit 120 to set the intensity of the image light beam IL to 0, that is, to turn off the light source module 121, and performs step S144 to cause the display unit 120 to display a warning sign of over-temperature, and then the processing unit 110 performs step S145 to cause the at least one driving member 132 to drive the at least one mirror 131 so that the reflection assembly 130 is in the closed state. Then, the processing unit 110 performs step S00 to wait for a period of time and then returns to perform step S110.

[0061] On the other hand, after the processing unit 110 performs the step S130, when the maximum value of the at least one temperature is less than or equal to the first threshold value, the processing unit 110 performs a step S150 to determine whether the reflection assembly 130 is in the closed state or the open state. When the reflection assembly 130 is in the closed state, the processing unit 110 performs a step S151 to drive the at least one driving member 132 to drive the at least one reflecting mirror 131 to switch the reflection assembly 130 to the open state, and then performs a step S152. When the reflection assembly 130 is in the open state, the processing unit 110 directly performs the step S152 to determine whether the intensity of the image light beam IL is the maximum value of the intensity of the image light beam IL. The maximum value of the intensity of the image light beam IL can be the maximum brightness of the image light beam IL that the display unit 120 can provide, or can be the original brightness setting value of the image light beam IL.

[0062] When the intensity of the image light beam IL is not the maximum value of the intensity of the image light beam IL, the processing unit 110 performs a step S153 to adjust the intensity of the image light beam IL by the processing unit 110. The processing unit 110 adjusts the intensity of the image light beam IL by an amplitude of 5-15% of the maximum value of the intensity of the image light beam IL each time. For example, in the embodiment, the processing unit 110 adjusts the intensity of the image light beam IL by 10% of the maximum value of the intensity of the image light beam IL each time. Then, the step S00 is performed to wait for a period of time, and then the step S110 is performed again.

[0063] When the intensity of the image light beam IL is the maximum value of the intensity of the image light beam IL, the processing unit 110 directly performs the step S00 to wait for a period of time, and then the step S110 is performed again. In the embodiment, the period of time is, for example, 10-20 seconds, and for example, the period of time is 15 seconds. In this way, the temperature sensor and the ambient temperature sensor 150 have sufficient response time to measure more accurate temperatures.

[0064] In this way, according to the above process, when the maximum value of the at least one temperature is greater than the first threshold value, the processing unit 110 is configured to adjust the intensity of the image light beam IL and / or to switch the reflection assembly 130 to the closed state. When the maximum value of the at least one temperature is less than or equal to the first threshold value, the processing unit 110 is configured to adjust the intensity of the image light beam IL and / or to switch the reflection assembly 130 to the open state.

[0065] In the present embodiment, when the maximum value of the at least one temperature is greater than the first threshold value and the intensity of the image light beam IL is 0, the processing unit 110 is configured to drive the at least one driving element 132 to drive the at least one mirror 131 to switch the reflection assembly 130 to the closed state. When the maximum value of the at least one temperature is greater than the second threshold value, the processing unit 110 is configured to adjust the intensity of the image light beam IL to 0 and drive the at least one driving element 132 to drive the at least one mirror 131 to switch the reflection assembly 130 to the closed state.

[0066] On the other hand, when the maximum value of the at least one temperature is less than or equal to the first threshold value and the reflection assembly 130 is in the closed state, the processing unit 110 is configured to switch the reflection assembly 130 to the open state. In the present embodiment, when the maximum value of the at least one temperature is less than or equal to the first threshold value, the reflection assembly 130 is in the open state, and the intensity of the image light beam IL is not the maximum value of the intensity of the image light beam IL, the processing unit 110 is configured to adjust the intensity of the image light beam IL by the display unit 120.

[0067] In this way, the head-up display device 100 can effectively detect whether the ambient light beam SL is incident on the display unit 120 and correspondingly adjust the intensity of the image light beam IL by the control of the processing unit 110 on the display unit 120, the reflection assembly 130, and the at least one temperature sensor 140, so as to avoid damage to the head-up display device 100 caused by a large amount of ambient light beam SL.

[0068] In addition, in step S120 of the foregoing embodiment, the processing unit 110 obtains the ambient temperature by detection of the ambient temperature sensor 150, and the algorithm for obtaining the first threshold value and the second threshold value is exemplified. However, in other embodiments, in step S120, the first threshold value and the second threshold value can also be other parameters stored in the storage medium or the processing unit 110, so that the first threshold value and the second threshold value can be directly read by the processing unit 110 without the need for detection of the ambient temperature.

[0069] In addition, in the foregoing embodiment, the light modulation module 122 of the display unit 120 is exemplified as a display panel. In other embodiments, the light modulation module 122 can be a digital micro-mirror device (DMD), and the head-up display device 100 can also achieve the foregoing functions by the temperature control method of the head-up display device 100, so as to achieve the foregoing effects and advantages. The following will be further described in conjunction with Figure 6A and Figure 6B .

[0070] Figure 6A and Figure 6B is Figure 1Another light path schematic diagram of the head-up display device when irradiated by the ambient light beam SL. The head-up display device 600 of the present embodiment is similar to the head-up display device 100, and the differences are described as follows. As shown in Figure 2 Figure 6A Figure 6B In the present embodiment, the light modulation module 622 of the display unit 620 of the head-up display device 600 is a digital micro-mirror device (DMD), and the display unit 620 further includes a diffuser 623 and a lens module 624. The illumination light beam of the light source module 121 of the display unit 620 is converted into an image light beam IL after being transmitted to the light modulation module 622, and the image light beam IL is converged to form an image on the diffuser 623 via the lens module 624, and then the image light beam IL is transmitted to the reflection assembly 130 through the diffuser 623, so that a virtual image can also be displayed in front of the eyes of the viewer V.

[0071] Figure 6A Figure 6B As shown in Figure 5 In the present embodiment, when the ambient light beam SL is incident at a specific angle, it is also possible to be incident on the light modulation module 622 in the display unit 620, and also pass through the first mirror 131A and the first mirror 131B of the reflection assembly 130. Therefore, the head-up display device 600 can effectively detect whether the ambient light beam SL is incident on the display unit 620 by controlling the display unit 620, the reflection assembly 130, and the at least one temperature sensor 140 by the processing unit 160, and can be used to perform the temperature control method of the head-up display device as shown in

[0072] In summary, in the head-up display device and the temperature control method of the head-up display device of the present embodiment, the head-up display device can effectively detect whether the ambient light beam is incident on the display unit by controlling the display unit, the reflection assembly, and the at least one temperature sensor by the processing unit, and correspondingly adjust the intensity of the image light beam and / or adjust the state of the reflection assembly, so as to avoid the head-up display device being damaged by a large amount of ambient light beam irradiation.

[0073] ​​​​The above descriptions are only the preferred embodiments of the present application, and cannot limit the scope of the present application, and any simple equivalent changes or modifications made according to the claims and the content of the present application are still within the scope of the present application. In addition, any embodiment or claim of the present application does not need to achieve all the purposes, advantages or features disclosed in the present application. In addition, the abstract and title (invention name) are only used to assist the patent document retrieval, and are not used to limit the scope of the present application. In addition, the terms "first", "second" and the like mentioned in the specification or claims are only used to name elements or distinguish different embodiments or ranges, and are not used to limit the upper or lower limit of the number of elements.

Claims

1. A head-up display device, characterized in that, The head-up display device includes a display unit, a reflective component, at least one temperature sensor, and a processing unit, wherein: The display unit is used to provide an image beam; The reflective component is disposed on the transmission path of the image beam and has an on state and an off state; The at least one temperature sensor is disposed on the reflective component for sensing the reflective component to obtain at least one temperature; and The processing unit is electrically connected to the display unit, the reflective component, and the at least one temperature sensor, and is used to periodically control the at least one temperature sensor to sense and obtain the at least one temperature from the at least one temperature sensor. When the maximum value of the at least one temperature exceeds a first threshold, the processing unit is configured to cause the display unit to reduce the intensity of the image beam and / or to put the reflective component into the off state. When the maximum value of the at least one temperature is less than or equal to the first threshold, the processing unit is used to cause the display unit to increase the intensity of the image beam and / or to put the reflective component into the on state.

2. The head-up display device according to claim 1, characterized in that, The processing unit reduces the intensity of the image beam by an amount between 5% and 15% of the maximum intensity of the image beam each time.

3. The head-up display device according to claim 1, characterized in that, The head-up display device further includes an ambient temperature sensor for sensing ambient temperature. The processing unit is electrically connected to the ambient temperature sensor to obtain the ambient temperature, and the processing unit obtains the first threshold based on the ambient temperature and the reference temperature of the display unit.

4. The head-up display device according to claim 3, characterized in that, The processing unit obtains a second threshold based on the ambient temperature and the specified temperature of the display unit, wherein the second threshold is greater than the first threshold.

5. The head-up display device according to claim 4, characterized in that, The reflective assembly includes at least one reflector and at least one driving member, the at least one driving member being electrically connected to the processing unit, and the at least one driving member being used to drive the at least one reflector based on instructions from the processing unit.

6. The head-up display device according to claim 5, characterized in that, When the maximum value of the at least one temperature is greater than the first threshold and the intensity of the image beam is 0, the processing unit is configured to cause the at least one driving member to drive the at least one reflector to switch the reflective component to the off state.

7. The head-up display device according to claim 5, characterized in that, When the maximum value of the at least one temperature is greater than the second threshold, the processing unit adjusts the intensity of the image beam to 0 and causes the at least one driving member to drive the at least one reflector, so that the reflection component switches to the off state.

8. The head-up display device according to claim 5, characterized in that, At least one reflector includes a plurality of reflectors, and the at least one temperature sensor is disposed on the surface of one of the plurality of reflectors facing away from the display unit.

9. The head-up display device according to claim 8, characterized in that, The at least one temperature sensor is a plurality of temperature sensors, and the plurality of temperature sensors are disposed at the center and the corners of one of the plurality of reflectors.

10. The head-up display device according to claim 1, characterized in that, When the maximum value of the at least one temperature is less than or equal to the first threshold and the reflective component is in the off state, the processing unit is used to switch the reflective component to the on state.

11. The head-up display device according to claim 1, characterized in that, When the maximum value of the at least one temperature is less than or equal to the first threshold, the reflective component is in the on state, and the intensity of the image beam is not the maximum value of the intensity of the image beam, the processing unit is used to cause the display unit to increase the intensity of the image beam.

12. A temperature control method for a head-up display device, characterized in that, The head-up display device includes a display unit, a reflective component, and a processing unit, wherein the display unit is used to provide an image beam, and the temperature control method of the head-up display device includes the following steps: The processing unit controls at least one temperature sensor disposed on the reflective component to periodically sense the temperature of the reflective component in order to obtain at least one temperature of the at least one temperature sensor. as well as The processing unit determines whether the maximum value of the at least one temperature from the at least one temperature sensor is greater than a first threshold, wherein... When the maximum value of the at least one temperature is greater than the first threshold, the display unit reduces the intensity of the image beam and / or the reflective component is turned off. When the maximum value of the at least one temperature is less than or equal to the first threshold, the display unit increases the intensity of the image beam and / or turns on the reflective component.

13. The temperature control method for the head-up display device according to claim 12, characterized in that, Each reduction in the intensity of the image beam is between 5% and 15% of the maximum intensity of the image beam.

14. The temperature control method for the head-up display device according to claim 12, characterized in that, The steps also include the following: The ambient temperature is sensed by an ambient temperature sensor; and The processing unit obtains the first threshold based on the ambient temperature and the reference temperature of the display unit.

15. The temperature control method for the head-up display device according to claim 14, characterized in that, The steps also include the following: The processing unit obtains a second threshold based on the ambient temperature and the specified temperature of the display unit, wherein the second threshold is greater than the first threshold.

16. The temperature control method for the head-up display device according to claim 15, characterized in that, The reflective component includes at least one reflector and at least one driving element, and the temperature control method of the head-up display device further includes the following steps: When the maximum value of the at least one temperature is greater than the first threshold, the processing unit determines whether the intensity of the image beam is 0. When the maximum value of the at least one temperature is greater than the first threshold and the intensity of the image beam is 0, the at least one driving member drives the at least one reflector to switch the reflective assembly to the off state.

17. The temperature control method for the head-up display device according to claim 16, characterized in that, The steps also include the following: The processing unit determines whether the maximum value of the at least one temperature of the at least one temperature sensor is greater than the second threshold. When the maximum value of the at least one temperature is greater than the second threshold, the intensity of the image beam is adjusted to 0, and the at least one driving member drives the at least one reflector to switch the reflector to the off state.

18. The temperature control method for the head-up display device according to claim 12, characterized in that, The steps also include the following: When the maximum value of the at least one temperature is less than or equal to the first threshold, the processing unit determines whether the reflective component is in the off state or the on state. as well as When the maximum value of the at least one temperature is less than or equal to the first threshold and the reflective component is in the off state, the processing unit switches the reflective component to the on state.

19. The temperature control method for the head-up display device according to claim 12, characterized in that, The steps also include the following: When the maximum value of the at least one temperature is less than or equal to the first threshold, the processing unit determines whether the reflective component is in the off state or the on state. When the reflective component is in the on state, it is determined whether the intensity of the image beam is the maximum value of the intensity of the image beam; as well as When the reflective component is in the on state and the intensity of the image beam is not the maximum value of the intensity of the image beam, the processing unit causes the display unit to increase the intensity of the image beam.

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