Display device and vehicle display device

Abstract

The invention discloses a display device and a vehicle display device. The display device comprises an infrared camera shooting element, a display panel arranged on the infrared camera shooting element, an infrared penetrating optical structure arranged on the display panel and a decoration layer arranged on the infrared penetrating optical structure. The infrared penetrating optical junction has a plurality of through holes. The infrared ray penetration rate of the infrared ray penetration optical structure is greater than or equal to 80%. The penetration rate of the infrared penetrating optical structure to visible light is less than or equal to 30%. The decoration layer shields a plurality of through holes of the infrared ray penetrating optical structure.

Description

Technical Field

[0001] This invention relates to a display device and a vehicle display device. Background Technology

[0002] In recent years, the electric vehicle market has developed rapidly. Electric vehicles utilize a very high proportion of display devices for showing driving information and / or entertainment information. To create a cohesive atmosphere within the vehicle cabin, the surfaces of these display devices often feature decorative films that can display patterns, such as wood grain or checkerboard patterns. However, infrared camera elements are often located behind these decorative films, which negatively impacts the quality of the infrared images. Summary of the Invention

[0003] This invention provides a display device with excellent decorative effect and infrared image quality.

[0004] This invention provides a vehicle display device with excellent decorative effect and infrared image quality.

[0005] The display device of the present invention includes an infrared imaging element, a display panel disposed on the infrared imaging element, an infrared-transmitting optical structure disposed on the display panel, and a decorative layer disposed on the infrared-transmitting optical structure. The infrared-transmitting optical structure has multiple through-holes. The infrared transmittance of the infrared-transmitting optical structure is greater than or equal to 80%. The transmittance of the infrared-transmitting optical structure to visible light is less than or equal to 30%. The decorative layer shields the multiple through-holes of the infrared-transmitting optical structure.

[0006] The automotive display device of the present invention includes an infrared camera element, a display panel disposed on the infrared camera element, an infrared-transmitting optical structure disposed on the display panel, and a decorative layer disposed on the infrared-transmitting optical structure. The infrared-transmitting optical structure has multiple through-holes. The infrared transmittance of the infrared-transmitting optical structure is greater than or equal to 80%. The transmittance of the infrared-transmitting optical structure to visible light is less than or equal to 30%. The decorative layer shields the multiple through-holes of the infrared-transmitting optical structure. Attached Figure Description

[0007] Figure 1 This is a cross-sectional schematic diagram of a display device according to an embodiment of the present invention.

[0008] Figure 2 The transmission spectrum of an infrared light-transmitting shielding layer and an infrared light-transmitting adjustment layer according to an embodiment of the present invention is shown.

[0009] Figure 3 This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention.

[0010] Figure 4 This is a cross-sectional schematic diagram of a display device according to another embodiment of the present invention.

[0011] Explanation of reference numerals in the attached figures: 10, 10A, 10B: Display devices 10a: Display area 10b: Non-display area 110: Infrared camera element 120: Display panel 130: Light-transmitting protective cover 140: Connector 150: Translucent substrate 160: Decorative layer 170: Infrared light penetrates optical structures 170a: Through hole 172: Infrared rays penetrate the light-shielding layer 172a: First opening 174: Infrared Penetration Adjustment Layer 174a: Second opening 180: Pressure-sensitive adhesive Detailed Implementation

[0012] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element references are used in the drawings and description to denote the same or similar parts.

[0013] It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected" to another element, it may be directly on or connected to the other element, or an intermediate element may also be present. Conversely, when an element is referred to as being "directly on" or "directly connected" to another element, no intermediate element is present. As used herein, "connection" can refer to physical and / or electrical connection. Furthermore, "electrical connection" or "coupling" may involve the presence of other elements between the two elements.

[0014] As used herein, “about,” “approximately,” or “substantially” includes the value and the average value within an acceptable range of deviations from a particular value as determined by one of ordinary skill in the art, taking into account the measurement under discussion and a particular number of errors associated with the measurement (i.e., limitations of the measurement system). For example, “about” may mean within one or more standard deviations of the value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, the use of “about,” “approximately,” or “substantially” herein may be chosen based on the optical, etched, or other properties to select a more acceptable range of deviations or standard deviations, and may not require a single standard deviation to apply to all properties.

[0015] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having the same meaning as they have in the context of the relevant technology and the invention, and will not be interpreted as having an idealized or overly formal meaning unless expressly defined herein.

[0016] Figure 1 This is a cross-sectional schematic diagram of a display device 10 according to an embodiment of the present invention. In some embodiments, the display device 10 may be an automotive display device. However, the present invention is not limited thereto, and in other embodiments, the display device 10 may also be applied to other fields, such as: smartphone touch panels, home appliance panels, architectural glass, etc.

[0017] Please refer to Figure 1 The display device 10 includes an infrared imaging element 110 and a display panel 120. The display panel 120 is disposed on the infrared imaging element 110. In some embodiments, the infrared imaging element 110 includes an imaging lens (not shown) and a photosensitive element (not shown), the photosensitive element being disposed behind the imaging lens, the imaging lens being used to receive infrared light (not shown) passing through the display panel 120 for imaging onto the photosensitive element. The display panel 120 may be a self-emissive display panel or a non-self-emissive display panel. For example, in some embodiments, the self-emissive display panel may include a micro light-emitting diode (μLED) display panel or an organic light-emitting diode (OLED) display panel, and the non-self-emissive display panel may include a liquid crystal display panel, but the present invention is not limited thereto.

[0018] In some embodiments, the display device 10 may optionally include a light-transmitting protective cover 130 disposed on the display panel 120. In some embodiments, the light-transmitting protective cover 130 may be connected to the display panel 120 via a connector 140. For example, in some embodiments, the connector 140 may include optically clear adhesive tape (OCA) or optically clear resin (OCR), but the present invention is not limited thereto.

[0019] The display device 10 further includes an infrared-transmitting optical structure 170 and a decorative layer 160. The infrared-transmitting optical structure 170 is disposed on the display panel 120. The decorative layer 160 is disposed on the infrared-transmitting optical structure 170. The decorative layer 160 has a pattern to give the display device 10 a decorative function. In some embodiments, the pattern of the decorative layer 160 is, for example, wood grain. However, the invention is not limited thereto, and the pattern of the decorative layer 160 may be determined according to actual needs. In other embodiments, the pattern of the decorative layer 160 may be other styles.

[0020] In some embodiments, the display device 10 further includes a light-transmitting substrate 150, a decorative layer 160, and an infrared-transmitting optical structure 170, which may be sequentially formed on the light-transmitting substrate 150 and then bonded together to the light-transmitting protective cover 130. After the light-transmitting substrate 150, the decorative layer 160, and the infrared-transmitting optical structure 170 are bonded to the light-transmitting protective cover 130, the infrared-transmitting optical structure 170 is located between the decorative layer 160 and the display panel 120, and the decorative layer 160 is located between the light-transmitting substrate 150 and the infrared-transmitting optical structure 170. In some embodiments, the light-transmitting substrate 150, the decorative layer 160, and the infrared-transmitting optical structure 170 may be selectively bonded to the light-transmitting protective cover 130 using a pressure-sensitive adhesive 180, but the present invention is not limited thereto.

[0021] It is worth noting that the infrared-transmitting optical structure 170 is disposed on the display panel 120 and has a plurality of through holes 170a, and the decorative layer 160 is disposed on the infrared-transmitting optical structure 170 and blocks the plurality of through holes 170a of the infrared-transmitting optical structure 170. In some embodiments, the decorative layer 160 has no openings and can completely block the plurality of through holes 170a. The infrared-transmitting optical structure 170 has a transmittance of infrared light greater than or equal to 80%, which refers to the transmittance of light beams with wavelengths including 940 nm. The infrared-transmitting optical structure 170 has a transmittance of visible light less than or equal to 30%. The infrared-transmitting optical structure 170 has a transmittance of visible light greater than or equal to 30%, which refers to the transmittance of light beams with wavelengths including 400 nm to 700 nm.

[0022] It is worth mentioning that, because the infrared penetrating optical structure 170 has a high transmittance for infrared light, even when the decorative layer 160 has no openings, a high proportion of the infrared light reflected by external objects can still pass through the infrared penetrating optical structure 170, thereby forming a clear image on the photosensitive element of the infrared imaging element 110. Therefore, both a good decorative effect and a clear infrared image can be obtained simultaneously.

[0023] In some embodiments, the aperture ratio of the infrared-transmitting optical structure 170 may fall within the range of 70% to 90%. In some embodiments, the haze of the stack of the infrared-transmitting optical structure 170 and the decorative layer 160 may be less than 30%, thereby improving the quality of the infrared image.

[0024] In some embodiments, the infrared-transmitting optical structure 170 includes an infrared-transmitting light-shielding layer 172 and an infrared-transmitting adjustment layer 174. The infrared-transmitting adjustment layer 174 is disposed on the infrared-transmitting light-shielding layer 172, and the infrared-transmitting light-shielding layer 172 is located between the infrared-transmitting adjustment layer 174 and the display panel 120, and the infrared-transmitting adjustment layer 174 is located between the decorative layer 160 and the infrared-transmitting light-shielding layer 172. The infrared-transmitting light-shielding layer 172 has a plurality of first openings 172a. The infrared-transmitting adjustment layer 174 has a plurality of second openings 174a. The plurality of first openings 172a and the plurality of second openings 174a are aligned. Each through-hole 170a of the infrared-transmitting optical structure 170 includes one aligned first opening 172a and one aligned second opening 174a.

[0025] Figure 2 The transmission spectrum of an infrared light-transmitting shielding layer and an infrared light-transmitting adjustment layer according to an embodiment of the present invention is shown. Please refer to... Figure 1 and Figure 2 The wavelength of visible light includes 400nm to 700nm, and the transmittance of the infrared penetration adjustment layer 174 to visible light is greater than that of the infrared penetration shielding layer 172 to visible light. For example, in some embodiments, the transmittance of the infrared penetration adjustment layer 174 to visible light falls within the range of 5% to 30%, and the transmittance of the infrared penetration shielding layer 172 to visible light is less than 5%.

[0026] Table 1 below lists the transmittance of infrared and visible light, the aperture ratio of the infrared transmittance adjustment layer 174 and the infrared transmittance shielding layer 172 and their stacked structure of a plurality of samples of a display device 10 according to an embodiment of the present invention, the color difference and reflectance of the display area 10a and the non-display area 10b, and the brightness and color saturation of the decorative layer 160. Figure 1 In the embodiments, samples 1-3 all meet the requirement that the transmittance of infrared light with a wavelength of 940nm is greater than 80%, and the transmittance of visible light of samples 1-3 falls within the range of 42% to 73%.

[0027] Please refer to Figure 1 In some embodiments, the display device 10 has a display area 10a and a non-display area 10b, with the display panel 120 located in the display area 10a and the non-display area 10b located outside the display panel 120. Please refer to... Figure 1As shown in Table 1 below, the data in Table 1 proves that the infrared penetration adjustment layer 174 can adjust the brightness range of the decorative layer 160, making the color saturation of the decorative layer 160 relatively high, while the infrared penetration shielding layer 172 can effectively reduce the color difference ΔE / reflectivity difference ΔR between the display area 10a and the non-display area 10b.

[0028] Specifically, in Figure 1 In the embodiments described, the color difference ΔE between the display area 10a and the non-display area 10b is less than or equal to 1.5, and the reflectance difference ΔR between the display area 10a and the non-display area 10b is less than or equal to 1.5%. More specifically, the color difference ΔE between the display area 10a and the non-display area 10b is less than or equal to 1.0, and the reflectance difference ΔR between the display area 10a and the non-display area 10b is less than or equal to 1.0%. However, the present invention is not limited thereto.

[0029]

[0030] Table 1

[0031] A comparative display device (not shown) is similar to the display device 10 of an embodiment of the present invention, except that the comparative display device does not include the infrared-transmitting optical structure 170 of the display device 10 of the embodiment, but includes a light-shielding layer disposed on the display panel 120 and having a plurality of through holes, and a decorative layer disposed on the light-shielding layer and having a plurality of through holes, wherein the plurality of through holes of the light-shielding layer are respectively aligned with the plurality of through holes of the decorative layer. The composite structure of the light-shielding layer and the decorative layer of the comparative display device has an infrared transmittance of 30%. The composite structure of the light-shielding layer and the decorative layer of the comparative display device has a visible light transmittance of 30%. The haze of the composite structure of the light-shielding layer and the decorative layer of the comparative display device is about 26%. The comparative display device has a low boundary between the display area and the non-display area and a high color saturation of the decorative pattern, but poor infrared image quality. The display device 10 of this embodiment not only has a low boundary between the display area 10a and the non-display area 10b and a high color saturation of the decorative pattern, but also has excellent infrared image quality.

[0032] It must be noted that the following embodiments use the component reference numerals and some content from the foregoing embodiments, with the same reference numerals used to represent the same or similar components, and descriptions of the same technical content omitted. For explanations of the omitted parts, please refer to the foregoing embodiments; these will not be repeated in the following embodiments.

[0033] Figure 3 This is a cross-sectional schematic diagram of a display device 10A according to another embodiment of the present invention. Figure 3 The display device 10A and Figure 1 The display device 10 is similar to the display device 10, but the difference between the two is that the infrared transmission optical structures 170 and 170A are different.

[0034] Please refer to Figure 3 Specifically, in this embodiment, the infrared transmission optical structure 170A includes an infrared transmission adjustment layer 174, but does not include... Figure 1 The infrared light-transmitting shielding layer 172. In this embodiment, the transmittance of the infrared light-transmitting adjustment layer 174 to visible light falls within the range of 5% to 30%, the transmittance of the infrared light-transmitting adjustment layer 174 to infrared light is greater than 90%, and the infrared light-transmitting adjustment layer 174 has multiple through holes 170a of the infrared light-transmitting optical structure 170A.

[0035] Table 2 below lists the transmittance of the decorative layer 160, the infrared transmittance adjustment layer 174, and their stacked structure to infrared and visible light for multiple samples of the display device 10A according to another embodiment of the present invention; the aperture ratio of the infrared transmittance adjustment layer 174; the color difference and reflectance of the display area 10a and the non-display area 10b; and the brightness and color saturation of the decorative layer 160. Figure 3 In the embodiments, the transmittance of infrared light with a wavelength of 940nm for samples 1 to 3 is greater than 80%, and the transmittance of visible light for samples 1 to 3 falls within the range of 60% to 81%.

[0036]

[0037] Table 2

[0038] Please refer to Figure 3 As shown in Table 2 above, the infrared penetration adjustment layer 174 can adjust the brightness range of the decorative layer 160, resulting in relatively high color saturation of the decorative layer 160. The absence of an infrared penetration shielding layer 172 leads to a larger color difference ΔE / reflectivity difference ΔR between the display area 10a and the non-display area 10b. In this embodiment, the boundary between the display area 10a and the non-display area 10b of the display device 10A is acceptable, the decorative pattern has high color saturation, and the infrared image quality is good.

[0039] Figure 4 This is a cross-sectional schematic diagram of a display device 10B according to another embodiment of the present invention. Figure 4 The display device 10B and Figure 1 The display device 10 is similar to the display device 10, but the difference between the two is that the infrared transmission optical structures 170 and 170B are different.

[0040] Please refer to Figure 4 Specifically, in this embodiment, the infrared-transmitting optical structure 170B includes an infrared-transmitting light-shielding layer 172, but does not include... Figure 1The infrared penetration adjustment layer 174. In this embodiment, the infrared penetration light-shielding layer 172 has a transmittance of less than 5% for visible light and a transmittance of more than 90% for infrared light, and the infrared penetration light-shielding layer 172 has multiple through holes 170a of the infrared penetration optical structure 170B.

[0041]

[0042] Table 3

[0043] Table 3 above lists the transmittance of the decorative layer 160, the infrared light-transmitting shielding layer 172, and their stacked structure to infrared and visible light, the aperture ratio of the infrared light-transmitting shielding layer 172, the color difference and reflectance of the display area 10a and the non-display area 10b, and the brightness and color saturation of the decorative layer 160 for multiple samples of the display device 10B according to another embodiment of the present invention. Figure 4 In the embodiments, the transmittance of samples 1-3 for infrared light with a wavelength of 940nm was all greater than 80%, and the transmittance of samples 1-3 for visible light all fell within the range of 60%-81%. Please refer to... Figure 4 As shown in Table 3 above, the infrared penetration shielding layer 172 can effectively reduce the color difference ΔE and reflectivity difference ΔR between the display area 10a and the non-display area 10b. The absence of the infrared penetration adjustment layer 174 results in relatively low brightness and color saturation of the decorative layer 160. In this embodiment, the display device 10B exhibits low boundary blurring between the display area 10a and the non-display area 10b, acceptable color saturation of the decorative pattern, and excellent infrared image quality.

Claims

1. A display device, comprising: An infrared camera element; A display panel is mounted on the infrared camera element; An infrared-transmitting optical structure is disposed on the display panel and has multiple through holes, wherein the infrared-transmitting optical structure has a transmittance of infrared light greater than or equal to 80%, and a transmittance of visible light less than or equal to 30%; and A decorative layer is disposed on the infrared-transmitting optical structure and shields the through holes of the infrared-transmitting optical structure.

2. The display device of claim 1, wherein the haze of the stack of the infrared light penetrating the optical structure and the decorative layer is less than 30%.

3. The display device as claimed in claim 1, wherein the aperture ratio of the infrared light penetrating optical structure falls within the range of 70% to 90%.

4. The display device of claim 1, wherein the infrared-transmitting optical structure comprises: An infrared ray penetrates the light-shielding layer; as well as An infrared penetration adjustment layer is disposed on the infrared penetration shielding layer, wherein the infrared penetration shielding layer is located between the infrared penetration adjustment layer and the display panel, and the infrared penetration adjustment layer is located between the decorative layer and the infrared penetration shielding layer.

5. The display device of claim 4, wherein the infrared light-transmitting shielding layer has a plurality of first openings, the infrared light-transmitting adjustment layer has a plurality of second openings, and each through hole includes a first opening and a second opening that are tangent to each other.

6. The display device of claim 4, wherein the transmittance of the infrared light penetration adjustment layer to the visible light is greater than the transmittance of the infrared light penetration shielding layer to the visible light.

7. The display device of claim 6, wherein the transmittance of the infrared light penetration adjustment layer to the visible light falls within the range of 5% to 30%, and the transmittance of the infrared light penetration shielding layer to the visible light is less than 5%.

8. The display device of claim 1, wherein the infrared transmission optical structure includes an infrared transmission adjustment layer, the infrared transmission adjustment layer having a transmittance of the visible light in the range of 5% to 30%, the infrared transmission adjustment layer having a transmittance of the infrared light greater than 90%, and the infrared transmission adjustment layer having the through holes.

9. The display device of claim 1, wherein the infrared penetrating optical structure includes an infrared penetrating light-shielding layer, the infrared penetrating light-shielding layer having a transmittance of less than 5% to visible light, the infrared penetrating light-shielding layer having a transmittance of more than 90% to infrared light, and the infrared penetrating light-shielding layer having the through holes.

10. The display device of claim 1, wherein the display device has a display area and a non-display area, the display panel is located in the display area, and the non-display area is located outside the display panel; a color difference value between the display area and the non-display area is less than or equal to 1.5, or a reflectance difference between the display area and the non-display area is less than or equal to 1.

5.

11. A vehicle display device, comprising: An infrared camera element; A display panel is mounted on the infrared camera element; An infrared-transmitting optical structure is disposed on the display panel and has multiple through holes, wherein the infrared-transmitting optical structure has a transmittance of infrared light greater than or equal to 80%, and a transmittance of visible light less than or equal to 30%; and A decorative layer is disposed on the infrared-transmitting optical structure and shields the through holes of the infrared-transmitting optical structure.

12. The vehicle display device of claim 11, wherein the haze of the stack of the infrared-transmitting optical structure and the decorative layer is less than 30%.

13. The vehicle display device as claimed in claim 11, wherein the aperture ratio of the infrared penetration optical structure falls within the range of 70% to 90%.

14. The vehicle display device as claimed in claim 11, wherein the infrared-transmitting optical structure comprises: An infrared ray penetrates the light-shielding layer; as well as An infrared penetration adjustment layer is disposed on the infrared penetration shielding layer, wherein the infrared penetration shielding layer is located between the infrared penetration adjustment layer and the display panel, and the infrared penetration adjustment layer is located between the decorative layer and the infrared penetration shielding layer.

15. The automotive display device of claim 14, wherein the infrared light-penetrating shielding layer has a plurality of first openings, the infrared light-penetrating adjustment layer has a plurality of second openings, and each of the through holes includes a first opening and a second opening that are tangent to each other.

16. The automotive display device of claim 14, wherein the transmittance of the infrared penetration adjustment layer to the visible light is greater than the transmittance of the infrared penetration shielding layer to the visible light.

17. The automotive display device of claim 16, wherein the transmittance of the infrared penetration adjustment layer to the visible light falls within the range of 5% to 30%, and the transmittance of the infrared penetration shielding layer to the visible light is less than 5%.

18. The automotive display device of claim 11, wherein the infrared transmission optical structure includes an infrared transmission adjustment layer, the infrared transmission adjustment layer having a transmittance of the visible light in the range of 5% to 30%, the infrared transmission adjustment layer having a transmittance of the infrared light greater than 90%, and the infrared transmission adjustment layer having the through holes.

19. The vehicle display device of claim 11, wherein the infrared penetrating optical structure includes an infrared penetrating light-shielding layer, the infrared penetrating light-shielding layer having a transmittance of less than 5% to visible light, the infrared penetrating light-shielding layer having a transmittance of more than 90% to infrared light, and the infrared penetrating light-shielding layer having the through holes.

20. The vehicle display device of claim 11, wherein the display device has a display area and a non-display area, the display panel is located in the display area, and the non-display area is located outside the display panel; a color difference value between the display area and the non-display area is less than or equal to 1.5, or a reflectance difference between the display area and the non-display area is less than or equal to 1.5.

Images