HUD temperature detection device

Abstract

The utility model discloses an HUD temperature detection device which comprises a flexible circuit board arranged between a display screen and an upper cover and a photosensitive sensor arranged on a secondary curved mirror, and a plurality of temperature sensors which are in contact with the display screen and are used for measuring the surface temperature of the display screen are arranged on the flexible circuit board at intervals. A fixing pad for fixing the flexible circuit board is arranged between the flexible circuit board and the upper cover, and the upper cover is provided with a notch for installing the flexible circuit board. The temperature sensor used for measuring the temperature of the display screen is arranged, the temperature sensor and the photosensitive sensor arranged on the secondary curved mirror act together, the temperature of the display screen can be directly measured, and therefore it is guaranteed that the display screen works within the proper temperature range.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle-mounted displays, and particularly relates to a HUD temperature detection device. Background Art

[0002] In-vehicle HUD was first used in aviation, aiming to enable pilots to view instrument-related information without lowering their heads. With the development of technology, this technology has been widely applied in automobiles and has gone through developments such as CHUD (Combiner Head Up Display), WHUD (Windshield Head Up Display), and ARHUD (Augmented Reality Head Up Display). Compared with CHUD and WHUD, ARHUD has characteristics such as a large FOV (Field Of View) and a long VID (Virtual Distance). The increase in FOV and VID will cause the virtual image display screen to increase, enhancing the integration of augmented reality and virtual effects. However, the increase in FOV will lead to an increase in the HUD window, and when sunlight backflows, more sunlight will enter the HUD interior in the reverse direction. When the display screen size of the PGU is determined, when the virtual image display screen increases, the corresponding optical magnification will become larger, and the light spot will be more concentrated when sunlight backflows. The light spot converging on the PGU screen will quickly cause the temperature at that place on the screen to rise sharply. In severe cases, obvious burning phenomena will occur at that place and the screen will be burned out. Currently, in response to these situations, many patents have proposed some detection methods and corresponding countermeasures, but there are problems such as inaccurate detection and untimely detection, resulting in the early appearance or delayed execution of the protection rate.

[0003] Chinese patent CN114061790A discloses a method for detecting the temperature of a head-up display PGU, and CN22096225U discloses a temperature control device for preventing sunlight from flowing back into a HUD. Both devices have problems such as inaccurate detection and untimely detection, which results in premature or delayed implementation of protective measures. Similarly, Chinese patent CN110908124A discloses a HUD optical path system and its control method, and a HUD display device, and specifically discloses that the temperature on the TFT screen is detected by using a photosensitive sensor on a secondary curved mirror and a temperature sensor on the FPC cable of the TFT screen. Since the temperature sensor on the FPC cable of the TFT screen is not on the TFT screen, when sunlight flows back and the temperature on the TFT screen is already locally very high, the temperature rise of the temperature sensor on the FPC cable does not change significantly and may even fail sometimes. The most critical thing is that when the temperature inside the HUD is not dissipated in time, the temperature sensor on the FPC cable will collect the overall accumulated temperature rise inside the HUD, rather than the temperature on the TFT screen. Utility Model Content

[0004] The utility model proposes a HUD temperature detection device, which can accurately measure the temperature on the display screen and ensure that the display screen works within the designed temperature.

[0005] To this end, the technical solution adopted by the utility model is: a HUD temperature detection device, including a flexible circuit board arranged between a display screen and an upper cover and a photosensor arranged on a secondary curved mirror, a plurality of temperature sensors in contact with the display screen and used to measure the surface temperature of the display screen are arranged at intervals on the flexible circuit board, a fixing pad for fixing the flexible circuit board is arranged between the flexible circuit board and the upper cover, and a notch for installing the flexible circuit board is arranged on the upper cover.

[0006] As a preferred embodiment of the above solution, the fixing pad is made of foam with temperature resistance.

[0007] Further preferably, the upper cover is arranged on the mounting bracket through a third mounting structure, a display channel which passes through from top to bottom is arranged on the mounting bracket, a display screen groove for placing the display screen is arranged at the upper end of the display channel on the mounting bracket, and the outer side of the display screen groove is located outside the upper end of the display channel.

[0008] Further preferably, the third mounting structure includes a positioning protrusion at least arranged on either side surface of the mounting bracket, a positioning groove is arranged at a position corresponding to the positioning protrusion on the upper cover, a second clamping protrusion is arranged on two opposite side surfaces of the mounting bracket, and a second clamping protrusion that can be buckled on the second clamping protrusion is arranged at a position corresponding to the second clamping protrusion on the upper cover.

[0009] Further preferably, the mounting bracket is arranged on the reflecting seat through a second mounting structure. A substrate for mounting a light source is arranged below the reflecting seat. A light channel for light to pass through is arranged on the reflecting seat. An installation groove for mounting a diffusion component is arranged at the upper end of the reflecting seat, and the outside of the installation groove is located outside the upper end of the light channel.

[0010] Further preferably, the second mounting structure includes third mounting lugs arranged on any two opposite side surfaces at the upper end of the reflecting seat. Fourth mounting lugs are arranged at the corresponding positions of the bottom of the mounting bracket for the third mounting lugs. Second positioning columns are arranged on the third mounting lugs. Second positioning holes for inserting the second positioning columns are arranged on the fourth mounting lugs. Second bolt through holes for bolts to pass through are arranged on the fourth mounting lugs. Second threaded blind holes for tightening bolts and corresponding to the second bolt through holes are arranged on the third mounting lugs.

[0011] Further preferably, a second diffusion sheet is arranged below the display screen and is located in the display screen groove.

[0012] The beneficial effects of the present utility model: A temperature sensor for measuring the temperature of the display screen is provided, and it works together with the photosensitive sensor arranged on the secondary curved mirror to directly measure the temperature of the display screen, so as to ensure that the display screen works within a suitable temperature range. Description of the Drawings

[0013] Figure 1 It is the installation schematic diagram of the present utility model.

[0014] Figure 2 It is the schematic diagram of the mounting bracket in the present utility model.

[0015] Figure 3 It is the schematic diagram of the upper cover in the present utility model.

[0016] Figure 4 It is the schematic diagram of the display equipped with the present utility model Figure 1 。

[0017] Figure 5 It is the schematic diagram of the display equipped with the present utility model Figure 2 。

[0018] Figure 6 It is the schematic diagram of the diffusion component in the display equipped with the present utility model.

[0019] Figure 7 It is the schematic diagram of the reflecting seat in the display equipped with the present utility model.

[0020] Figure 8 It is the schematic diagram of the first reflecting member in the display equipped with the present utility model.

[0021] Figure 9Schematic diagram of the second light reflector in the display equipped with the present utility model.

[0022] Reference numerals: light reflector base - A, display component - B, diffusion component - C, temperature detection device - D, light channel - a, mounting groove - b, third mounting ear - d, second positioning post - e, second threaded blind hole - f, mounting hole - g, substrate - 1, first light reflector - 2, light groove - 2a, first mounting ear - 2b, first positioning post - 2c, first threaded blind hole - 2d, first clamping projection - 2e, second light reflector - 3, second mounting ear - 3a, second positioning hole - 3b, first bolt through - hole - 3c, first buckle - 3d, lens - 4, first diffusion sheet - 5, mounting bracket - 6, display channel - 6a, display screen groove - 6b, fourth mounting ear - 6c, second positioning hole - 6d, second bolt through - hole - 6e, positioning projection - 6f, second clamping projection - 6g, display screen - 7, upper cover - 8, display groove - 8a, positioning groove - 8b, second buckle - 8c, notch - 8d, second diffusion sheet - 9, flexible circuit board - 10, temperature sensor - 11, fixing pad - 12, light source - 13, radiator - 14. Detailed implementation manners

[0023] The present utility model will be further described below through embodiments in conjunction with the accompanying drawings:

[0024] As Figures 1-9 shown, a HUD temperature detection device, the entire temperature detection device is disposed within the display, and the display mainly consists of a light reflector base A, a display component B, and a diffusion component C. Among them, the light reflector base A is used for the installation of the entire display, and a mounting hole g for fixing the entire display is provided on the light reflector base A. A substrate 1 for mounting the light source 13 is disposed below the light reflector base A, a light channel a for the light of the light source to pass through is provided on the light reflector base A, and the diffusion component C is disposed on the light channel a for realizing the diffusion of the light of the light source. The display component B is disposed above the light reflector base A for realizing the display of images.

[0025] The display component B includes a mounting bracket 6 mounted on the light reflector base A through a second mounting structure. A display channel 6a that penetrates up and down and allows light to pass through is provided on the mounting bracket 6. A display screen groove 6b for placing the display screen 7 is provided at the upper end of the display channel 6a on the mounting bracket 6, and the outside of the display screen groove 6b is located outside the upper end of the display channel 6a. An upper cover 8 for fixing the display screen 7 is provided on the mounting bracket 6 through a third mounting structure, and a display groove 8a for the display screen 7 to leak out is provided on the upper cover 8.

[0026] The second installation structure includes third installation lugs d provided on any two opposite side surfaces at the upper end of the reflector base A. Correspondingly, fourth installation lugs 6c are provided at the positions of the bottom of the installation bracket 6 corresponding to the third installation lugs d. Second positioning posts e are provided on the third installation lugs d. Correspondingly, second positioning holes 6d for inserting the second positioning posts e are provided on the fourth installation lugs 6c. Second bolt through-holes 6e for bolts to pass through are provided on the fourth installation lugs 6c. Correspondingly, second threaded blind holes f for tightening the bolts and corresponding to the second bolt through-holes 6e are provided on the third installation lugs d. During installation, after the second positioning posts are inserted into the corresponding second positioning holes, positioning installation is achieved by tightening the bolts.

[0027] The third installation structure includes positioning protrusions 6f provided on at least any two side surfaces of the installation bracket 6. Correspondingly, positioning grooves 8b are provided at the positions of the upper cover 8 corresponding to the positioning protrusions 6f. Second clamping protrusions 6g are provided on two opposite side surfaces of the installation bracket 6. Correspondingly, second buckles 8c that can be buckled on the second clamping protrusions 6g are provided at the positions of the upper cover 8 corresponding to the second clamping protrusions 6g. During installation, after the positioning protrusions are inserted into the corresponding positioning grooves, positioning installation is achieved by buckling the second buckles on the second clamping protrusions. Preferably, some of the positioning protrusions and the fourth installation lugs are provided at the same position, so that the positioning protrusions can serve as reinforcing ribs for the fourth installation lugs.

[0028] Since the display channel is also set to be larger at the top and smaller at the bottom, preferably, a second diffusion sheet 9 located in the display screen slot 6b is provided below the display screen 7.

[0029] The temperature detection device D includes a flexible circuit board 10 provided between the display screen 7 and the upper cover 8 and a photosensitive sensor provided on the secondary curved mirror for detecting the light intensity on the secondary curved mirror. A plurality of temperature sensors 11 for measuring the surface temperature of the display screen 7 and in contact with the display screen 7 are provided at intervals on the flexible circuit board 10. A fixing pad 12 for fixing the flexible circuit board 10 is provided between the flexible circuit board 10 and the upper cover 8. At the same time, a notch 8d for installing the flexible circuit board 10 is provided on the upper cover 8. Through the combined action of the photosensitive sensor and the temperature sensor, the temperature of the display screen is ensured to be within a suitable range. Preferably, the fixing pad is made of heat-resistant foam, and the number of flexible circuit boards 10 is set according to needs.

[0030] For the convenience of processing the optical channel, the reflective seat A includes a first reflective member 2 and a second reflective member 3 mounted together through a first mounting structure. A light groove 2a that is vertically through and has a tapered shape with a larger upper part and a smaller lower part is provided on the first reflective member 2, and the light groove is an open groove. A first reflective surface 2a is provided on the side wall of the light groove 2a. A second reflective surface is provided on the second reflective member 3 at a position corresponding to the light groove 2a. After the first reflective member 2 and the second reflective member 3 are mounted together through the first mounting structure, the first reflective surface and the second reflective surface form an optical channel a for light to pass through.

[0031] The first mounting structure includes first mounting lugs 2b provided on two opposite side surfaces of the first reflective member 2, and second mounting lugs 3a provided on the second reflective member 3 at positions corresponding to the first mounting lugs 2b. A first positioning post 2c is provided on the first mounting lug 2b. Correspondingly, a second positioning hole 3b for the first positioning post 2c to pass through is provided on the second mounting lug 3a. A first bolt through-hole 3c for a tightening bolt to pass through is provided on the second mounting lug 3a. Correspondingly, a first threaded blind hole 2d for fixing the tightening bolt and corresponding to the first bolt through-hole 3c is provided on the first mounting lug 2b. A first clamping protrusion 2e for preliminary mounting is provided on the first reflective member 2. Correspondingly, a first clamping buckle 3d that can be buckled on the first clamping protrusion 2e is provided on the second reflective member 3 at a position corresponding to the first clamping protrusion 2e.

[0032] Preferably, the first clamping buckle and the first bolt through-hole are located on the upper and lower sides of the first positioning post. When the first reflective member and the second reflective member are mounted, first insert the first mounting post into the first mounting hole, then buckle the first clamping buckle on the first clamping protrusion to achieve preliminary fixation of the first reflective member and the second reflective member. Finally, pass a bolt through the first bolt through-hole and tighten it in the first threaded blind hole to achieve fixation of the first reflective member and the second reflective member. To ensure the sealing of the first reflective member and the second reflective member, the second mounting lug is bent towards the first reflective member and provided on the second reflective member, and the corresponding first mounting lug is provided in the middle of the side surface of the first reflective member.

[0033] The diffusion component C includes a lens 4 and a first diffusion sheet 5. The first diffusion sheet 5 is used to diffuse the light of the light source, and the lens 4 is used to filter the diffused light. An installation groove b for installing the diffusion component C is provided at the upper end of the reflective seat A, and the outside of the installation groove b is located outside the upper end of the optical channel a. The lens 4 and the first diffusion sheet 5 are stacked vertically in the installation groove b.

Claims

1. An HUD temperature detection device, characterized in that: A flexible circuit board (10) is disposed between a display screen (7) and an upper cover (8), and a photosensitive sensor is disposed on a secondary curved mirror. A plurality of temperature sensors (11) that are in contact with the display screen (7) and used for measuring the surface temperature of the display screen (7) are spaced apart on the flexible circuit board (10). A fixing pad (12) for fixing the flexible circuit board (10) is disposed between the flexible circuit board (10) and the upper cover (8). A notch (8d) for installing the flexible circuit board (10) is provided on the upper cover (8).

2. The HUD temperature detection device according to claim 1, wherein: The fixing pad (12) is made of a foam with heat-resistant properties.

3. The HUD temperature detection device according to claim 1, wherein: The upper cover (8) is disposed on a mounting bracket (6) through a third mounting structure. A display channel (6a) that penetrates up and down is provided on the mounting bracket (6). A display screen slot (6b) for placing the display screen (7) is provided at the upper end of the display channel (6a) on the mounting bracket (6), and the outside of the display screen slot (6b) is located outside the upper end of the display channel (6a).

4. The HUD temperature detection device according to claim 3, wherein: The third mounting structure includes positioning protrusions (6f) provided on at least any two side surfaces of the mounting bracket (6). Positioning grooves (8b) are provided at positions corresponding to the positioning protrusions (6f) on the upper cover (8). Second clamping protrusions (6g) are provided on two opposite side surfaces of the mounting bracket (6). Second buckles (8c) that can be buckled on the second clamping protrusions (6g) are provided at positions corresponding to the second clamping protrusions (6g) on the upper cover (8).

5. The HUD temperature detection device according to claim 3, characterized in that: The mounting bracket (6) is disposed on a reflector base through a second mounting structure. A substrate (1) for installing a light source (13) is disposed below the reflector base (A). A light channel (a) for light to pass through is provided on the reflector base (A). A mounting groove (b) for installing a diffusion component (C) is provided at the upper end of the reflector base (A), and the outside of the mounting groove (b) is located outside the upper end of the light channel (a).

6. The HUD temperature detection device according to claim 5, wherein: The second mounting structure includes third mounting lugs (d) provided on any two opposite side surfaces at the upper end of the reflector base (A). Fourth mounting lugs (6c) are provided at positions corresponding to the third mounting lugs (d) at the bottom of the mounting bracket (6). Second positioning posts (e) are provided on the third mounting lugs (d). Second positioning holes (6d) for inserting the second positioning posts (e) are provided on the fourth mounting lugs (6c). Second bolt through holes (6e) for bolts to pass through are provided on the fourth mounting lugs (6c). Second threaded blind holes (f) for tightening bolts and corresponding to the second bolt through holes (6e) are provided on the third mounting lugs (d).

7. The HUD temperature detection device according to claim 3, wherein: A second diffusion sheet (9) is disposed below the display screen (7) and within the display screen slot (6b).

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