Array substrate and display module

Abstract

The utility model provides an array substrate and a display module. The array substrate comprises a driving circuit layer and a thermal detection module. Wherein the thermal detection module is arranged on one side of the driving circuit layer, a light filtering layer is further arranged on one side, away from the driving circuit layer, of the thermal detection module, and the light filtering layer and the thermal detection module are arranged in an aligned mode. According to the embodiment of the utility model, the light filtering layer is arranged in the array substrate, external light is filtered by the light filtering layer and then reaches the thermal detection module, and the thermal detection module detects the ambient temperature, so that the thermal detection module is effectively integrated in the array substrate, and the detection precision and the detection effect of the array substrate are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of manufacturing light-emitting display devices, and in particular to an array substrate and a display module. Background Art

[0002] With the continuous development and improvement of display technology, people have put forward higher requirements on the display quality and effect of temperature measuring devices to enhance the user experience.

[0003] Temperature measuring devices have been widely used in various display fields, and the functions of panels are constantly improving. Traditional single-function temperature measuring devices can no longer meet people's usage needs. For example, in the field of vehicle-mounted displays, it is usually necessary to set up multiple temperature sensing devices in the cab, and use the temperature sensing devices to sense the internal temperature, so as to adjust the temperature. In traditional technical solutions, an infrared sensor is usually set up in the cab alone, and the indoor temperature is detected by the infrared sensor. Since the temperature sensing device is separated from the vehicle-mounted display screen and exists independently, the temperature measuring device often only corresponds to the display function, and an external circuit needs to be set up separately to drive the temperature sensing device. Alternatively, only a small number of infrared sensors can be set up inside the temperature measuring device, and the detection accuracy is not ideal when detecting, and the complexity of its design is increased, which is not conducive to the further development and improvement of the comprehensive performance of vehicle-mounted temperature measuring equipment.

[0004] In summary, in existing display products, the temperature measuring device cannot detect the temperature in the environment during normal operation, or the detection accuracy is not ideal. Utility Model Content

[0005] The embodiments of the utility model provide an array substrate and a display module to effectively improve the function of a temperature measuring device and improve its temperature detection accuracy, thereby achieving the purpose of improving the comprehensive performance of the temperature measuring device.

[0006] In order to solve the above technical problems, a first aspect of an embodiment of the utility model provides an array substrate, including:

[0007] a driving circuit layer; and,

[0008] A heat detection module is arranged on one side of the driving circuit layer, and a light filtering layer is also arranged on the side of the heat detection module away from the driving circuit layer, and the light filtering layer is arranged in alignment with the heat detection module.

[0009] According to an embodiment of the present utility model, the thermal detection module includes:

[0010] an amplifier circuit, electrically disposed on the driving circuit layer;

[0011] a heat detection unit, disposed on the amplifying circuit; and

[0012] The light absorbing layer is arranged on the heat detection unit.

[0013] According to an embodiment of the present invention, the detection module further includes a light collecting layer, and the light collecting layer is disposed on the light absorbing layer.

[0014] According to an embodiment of the present invention, the projection of the light absorbing layer on the driving circuit layer is located within the projection area of ​​the heat detection unit on the driving circuit layer.

[0015] According to an embodiment of the present invention, the heat detection unit includes a thermistor, and the resistivity of the thermistor is set to 2.5% to 5% / K.

[0016] According to a second aspect of the embodiment of the utility model, a display module is further provided, the display module comprising:

[0017] an array substrate, the array substrate comprising a driving circuit layer; and

[0018] A heat detection module is arranged on one side of the driving circuit layer, and a light filtering layer is also arranged on the side of the heat detection module away from the driving circuit layer, and the light filtering layer is arranged in alignment with the heat detection module.

[0019] According to an embodiment of the present invention, the display module further comprises a pixel unit, the pixel unit is arranged on the array substrate, and the thermal detection module is correspondingly arranged on a side of the pixel unit away from the matching substrate.

[0020] According to an embodiment of the present invention, the light filtering layer of the detection module corresponds to the pixel unit, and the light filtering layer is at least disposed in a region above a portion of the pixel unit.

[0021] According to an embodiment of the present utility model, the pixel unit includes a first pixel unit and a second pixel unit;

[0022] The light filter layer is correspondingly arranged on the light-emitting side of the second pixel unit, and the wavelength range of light passing through the light filter layer is 8um to 14um.

[0023] According to an embodiment of the present invention, the display module further comprises a pixel unit, the pixel unit is arranged on the array substrate, and the thermal detection module is correspondingly arranged on a side of the pixel unit away from the matching substrate.

[0024] Beneficial effects of the embodiments of the utility model: Compared with the prior art, the embodiments of the utility model provide an array substrate and a display module. The array substrate includes a driving circuit layer and a thermal detection module. The thermal detection module is arranged on one side of the driving circuit layer, and a light filtering layer is also arranged on the side of the thermal detection module away from the driving circuit layer, and the light filtering layer is arranged in alignment with the thermal detection module. In the embodiments of the utility model, by arranging a light filtering layer in the array substrate, the external light is filtered by the light filtering layer and reaches the thermal detection module, and the thermal detection module then detects the ambient temperature, thereby effectively integrating the thermal detection module into the array substrate and improving its detection accuracy and detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of a film structure of a display module provided in an embodiment of the utility model;

[0027] Figure 2 A film layer structure diagram of the array substrate provided in an embodiment of the utility model;

[0028] Figure 3 Another film structure of a display module provided in an embodiment of the utility model;

[0029] Figure 4 A schematic diagram of the film structure of another display module is provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In the following detailed description, only certain embodiments of the present invention are shown and described simply by way of illustration. As will be appreciated by those skilled in the art, the embodiments described herein may be modified in various ways without departing from the spirit or scope of the present invention.

[0031] In the drawings, the thickness of layers, films, panels, regions, etc. may be exaggerated for clarity and for better understanding and ease of description. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on another element," it can be directly on the other element or intervening elements may also be present.

[0032] In addition, unless explicitly described to the contrary, the word "comprise" and its variations like "include" or "contain" will be understood to imply the inclusion of the discussed elements, but not necessarily the exclusion of other elements. Further, in the specification, the word "on..." refers to placement above or below an object part, and does not necessarily mean placement on the upper side of an object part based on the direction of gravity.

[0033] It will be understood that although the terms "first", "second", etc. may be used herein to describe various components, these components should not be limited by these terms. These components are only used to distinguish one component from another component.

[0034] As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0035] It will also be understood that the terms “comprises” and / or “comprising” as used herein specify the presence of stated features or components, but do not exclude the presence or addition of one or more other features or components.

[0036] It will be understood that when a layer, region or component is referred to as being “formed on” another layer, region or component, it may be directly or indirectly formed on the other layer, region or component. For example, intervening layers, regions or components may be present.

[0037] In the following examples, the x-axis, y-axis, and z-axis are not limited to the three axes of the rectangular coordinate system and can be interpreted in a broader sense. For example, the x-axis, y-axis, and z-axis can be perpendicular to each other, or can represent different directions that are not perpendicular to each other.

[0038] The utility model provides an array substrate and a display module in an embodiment of the present invention. A heat detection module is integrated in a temperature measuring device to detect the temperature and improve the detection accuracy and effect.

[0039] like Figure 1 As shown, Figure 1 This is a schematic diagram of the membrane structure of a display module provided in an embodiment of the utility model. Figure 1 In the structure, the display module can be set as a liquid crystal display module, which includes an array substrate 18, a box substrate 102, a printed circuit board 104 and a display screen 105.

[0040] Specifically, when the array substrate 18 provided in the embodiment of the present application is provided, the array substrate 18 further includes a driving circuit layer 101 and a thermal detection module 103. The array substrate 18 is arranged opposite to the box substrate 102, and a liquid crystal layer 106 is also arranged in the display module. The liquid crystal layer 106 is sandwiched between the array substrate 18 and the box substrate 102. In one embodiment of the present utility model, the box substrate 102 can be set as a color filter substrate. When the box substrate 102 is set as a color filter substrate, the color filter substrate may include a filter layer and a black matrix layer (not shown in the figure).

[0041] Furthermore, when the array substrate 18 is set, the heat detection module 103 can be set on one side of the driving circuit layer 101, such as on the side of the circuit layer 101 close to the box substrate. When set, the heat detection module 103 can be at least partially set in the driving circuit layer 101 and electrically connected to the driving circuit layer 101. When external light enters the panel from one side and finally reaches the heat detection module 103, the heat detection module 103 detects the received light, and the main detection is infrared light, such as infrared light with a wavelength range of 8um to 14um, and the external environment temperature is obtained by detecting the intensity of the infrared light. Therefore, the ambient temperature can be detected while the normal display is performed.

[0042] Furthermore, the driving circuit layer 101 can be electrically connected to the printed circuit board 104 through the metal wiring 14, and the driving circuit board 14 is electrically connected to the display screen 105 through the wiring, so as to realize the luminous display of the display screen. In the embodiment of the present application, the display screen 105 can be set as an external display screen.

[0043] like Figure 2 As shown, Figure 2 The film layer structure diagram of the array substrate provided in the embodiment of the utility model. Figure 1 In the structure of the present invention, when the array substrate is set, the driving circuit layer 101 of the array substrate 18 may include multiple thin film transistors 01 and multiple interlayer dielectric layers.

[0044] Specifically, the thin film transistor 01 includes a semiconductor layer 011, a first gate layer 012, a second gate layer 013, and a source-drain metal layer 014. Meanwhile, the driving circuit layer 101 includes a buffer layer 201, a first insulating layer 202, a second insulating layer 203, an insulating dielectric layer 204, a first planarization layer 205, and a second planarization layer 206 stacked in sequence.

[0045] Among them, the semiconductor layer 011 is arranged between the first insulating layer 202 and the buffer layer 201, the first gate layer 012 is arranged between the first insulating layer 202 and the second insulating layer 203, the second gate layer 013 is arranged between the second insulating layer 203 and the insulating dielectric layer 204, and at the same time, the source-drain metal layer 014 is arranged between the insulating dielectric layer 204 and the first planarization layer 205, and the source-drain metal layer 014 is electrically connected to the bottom semiconductor layer through vias.

[0046] In the embodiment of the utility model, a second via hole 05 is further provided on the first planarization layer 205 and the second planarization layer 206, and a conductive metal 06 is provided in the second via hole 05. In the embodiment of the utility model, the thermal detection module is electrically connected to the conductive metal layer 06, so as to realize electrical connection with the bottom transistor through the conductive metal layer 06, so as to transmit or receive control signals and realize the temperature sensing function.

[0047] In the embodiment of the utility model, when the thermal detection module 103 is provided, the thermal detection module 103 further includes an amplifying circuit 301 , a thermal detection unit 302 , a light absorbing layer 303 and a light collecting layer 304 .

[0048] See Figure 2 The film layer structure in the embodiment of the present invention, the amplifier circuit 301 is electrically arranged on the driving circuit layer 101, and the structure of the amplifier circuit 1301 can be arranged according to the film layer of a conventional amplifier circuit. The heat detection unit 302 is arranged on the amplifier circuit 301 and is electrically connected to the amplifier circuit 301. When the heat detection module 103 is working, the heat detection unit 302 senses the external temperature and transmits the sensed data, thereby realizing the panel sensing the temperature.

[0049] Further, a light absorbing layer 303 is disposed on the thermal detection unit 302, and the light absorbing layer 303 is used to absorb the incident light from the outside and transmit the signal to the thermal detection unit 302. In the embodiment of the utility model, the length of the light absorbing layer 303 is less than or equal to the length of the thermal detection unit 302. That is, the projection of the light absorbing layer 303 on the driving circuit layer is located within the projection area of ​​the thermal detection unit 302 on the driving circuit layer. In this way, the thermal detection unit 302 can fully sense the signal on the light absorbing layer 303, thereby ensuring its sensing accuracy and sensitivity.

[0050] In the embodiment of the utility model, the light collecting layer 304 is arranged on the light absorbing layer 303 and the second planarization layer of the driving circuit layer, and the film area of ​​the light collecting layer 304 is greater than or equal to the film area of ​​the light absorbing layer 303. Among them, the light collecting layer 304 completely wraps the light absorbing layer 303. When the external light enters the temperature measuring device, it will first pass through the light collecting layer 304, and then be absorbed when reaching the light absorbing layer 303. In the embodiment of the utility model, the outer contour surface of the light collecting layer 304 can be set as a convex structure, such as an arc-shaped convexity, so as to ensure that the light has a higher focusing effect when passing through the light collecting layer 304, thereby improving the light absorption efficiency of the light absorbing layer 303 to ensure the accuracy of subsequent detection. In the embodiment of the present application, the height of the protrusions of the light-collecting layer 304 can be set according to the specifications of different products, and in the same display area, the heights of the protrusions corresponding to the light-collecting layer 304 are set to be the same, or for pixel units of the same color, the protrusions of the corresponding light-collecting layer 304 are set to the same height, while the protrusions of the light-collecting layer 304 corresponding to pixel units of different colors are set to different heights. In this way, through differentiated settings for light of different wavelengths, the light-collecting effect of the light-collecting layer 304 is further improved, thereby improving the detection accuracy of the panel.

[0051] Specifically, when setting the film layer in the above-mentioned detection module, the thermal detection unit 302 may include a thermistor, and the resistivity of the thermistor is set to 2.5% to 5% / K, which is the relationship between resistance and temperature. Optionally, the thermal detection unit 302 is set to polycrystalline silicon a-si material. At the same time, the light absorption layer 303 is set to a black light-absorbing material, such as a silver layer, and a black film layer is plated on the surface of the silver layer to enhance its light radiation and light absorption efficiency. Optionally, the thermal detection unit 302 and the light absorption layer 303 can also be set to other materials, which will not be repeated here.

[0052] Further, such as Figure 3 As shown, Figure 3 Another display module film structure provided in the embodiment of the present utility model. Figure 1-Figure 2 In the structure, the display module also includes a cover plate 412. The cover plate 412 is arranged on the side of the box substrate 102 away from the driving circuit layer 101, and the display module also includes a light filter layer 444. The light filter layer 444 is arranged on the side of the box substrate 102 close to the driving circuit layer, or the light filter layer 444 is arranged on the side of the cover plate 412 close to the driving circuit layer 101. In this way, when natural light from the outside enters the temperature measuring device, it will first pass through the light filter layer 444 and be filtered by the light filter layer 444. Most of the remaining light after filtering is infrared light, which is then received by the thermal detection module, thereby realizing the monitoring of the temperature of the external environment or the temperature of the external object.

[0053] Specifically, when setting the light filter layer 444, the light filter layer 444 is set corresponding to the thermal detection module 103, such as being set in the area directly above each thermal detection module 103, and in order to filter the light, the area of ​​the light filter layer 444 is greater than or equal to the area of ​​the thermal detection module 103.

[0054] Furthermore, in the embodiment of the utility model, the thickness of the light filter layer 444 can be set according to the type of product, and the number of the light filter layers 444 is the same as the number of the thermal detection modules 103, thereby ensuring that each thermal detection module 103 can work normally.

[0055] In the embodiment of the utility model, the wavelength range of the light allowed to pass through the light filter layer 444 is 8um to 14um. Optionally, the light filter layer 444 is set as a red filter layer. When natural light passes through the light filter layer 444, only red light can pass through the light filter layer, thereby ensuring the absorption and detection of subsequent infrared light.

[0056] See Figure 3 In the embodiment of the utility model, the angle of view (FOV) corresponding to the thermal detection module 103 is taken as an example, and when explaining, the array substrate or the corresponding display module can be applied to any thermal detection device. In the following embodiments, the vehicle-mounted thermal detection electronic device is used as an example for explanation, and the detection range of the vehicle-mounted thermal detection electronic device is taken as the cab area as an example to detect the temperature of the object. Among them, the relationship between the field of view FOV of each thermal detection module 103 and the various parameters of the object is:

[0057] S: D = 2 × tan (FOV / 2);

[0058] Wherein, S is the diameter of the detected area of ​​the object, and D is the distance between the detected object and the thermal detection module 103. In the present invention, since the distance between each film layer is smaller than the distance between the object and the temperature measuring device, when calculating, the distance D is actually the distance between the detected object and the panel cover.

[0059] exist Figure 3 In the figure, if the diameter of the detected area that each pixel unit can detect is S1=0.5m, and the diameter corresponding to the total area of ​​the detected object is S=1.25m, the FOV=13.3° is calculated according to the above calculation formula, and then the number of pixel units and thermal detection modules are arranged according to the size of the field of view FOV.

[0060] Further, such as Figure 4 As shown, Figure 4 The present invention provides a schematic diagram of the film structure of another display module in an embodiment of the present invention. Figure 1-Figure 3 In the structure, the display module provided in the embodiment of the utility model can be integrated in the vehicle display panel. By integrating the temperature measuring device in the display panel, normal display can be ensured on the one hand, and temperature measurement can be achieved on the other hand. Optionally, the display module can also be arranged in other modules or devices, which will not be repeated here. Specifically, when setting the display module, the display module also includes a pixel unit 777. Specifically, the pixel unit 777 is arranged on the side of the driving circuit layer 101 close to the cover plate, and at the same time, the pixel unit 777 is correspondingly arranged in the display area corresponding to the array substrate.

[0061] In the embodiment of the present invention, the pixel unit 777 includes a plurality of sub-pixels of different colors, such as red sub-pixels, blue sub-pixels, and green sub-pixels, and each sub-pixel can be arranged according to a certain arrangement rule to form the pixel unit 777 of the present invention. The pixel unit 777 and each sub-pixel in the pixel unit can be arranged according to the pixel structure in a conventional panel, which will not be described in detail here.

[0062] Furthermore, the heat detection module 103 in the present invention is arranged on a side of the pixel unit 777 away from the light filter layer 444. When the pixel unit 777 is arranged, the pixel unit 777 may include a first pixel unit 771 and a second pixel unit 772. The first pixel unit 771 may be arranged on a side of the second pixel unit 772.

[0063] In the embodiment of the present invention, the heat detection module 103 is disposed corresponding to the second pixel unit 772 , such as the light filter layer 444 is disposed corresponding to the light emitting side of each second pixel unit 772 .

[0064] Further, in the display area provided in the embodiment of the present utility model, the number of the first pixel units 771 is greater than the number of the second pixel units 772. On the one hand, the number of pixel units for normal display is guaranteed, thereby ensuring the normal light emission and display effect of the temperature measuring device. On the other hand, since the light emitting side of the second pixel unit 772 is provided with a light filter layer 444, the light filter layer 444 will absorb part of the emitted light and thus reduce the display effect in the area. In the embodiment of the present utility model, the number of the second pixel units 772 is less than the number of the first pixel units 771, thereby ensuring its thermal detection accuracy while still having a high display effect.

[0065] In the embodiment of the utility model, when the first pixel unit 771 and the second pixel unit 772 are arranged, they can be arranged according to a certain ratio, such as the number of the first pixel unit 771 arranged is greater than three times the number of the second pixel unit 772 arranged. Optionally, the ratio of the number of the first pixel unit 771 to the number of the second pixel unit 772 is 9:1. In this way, the thermal detection accuracy and detection effect of the display module can be guaranteed, and at the same time, a higher display effect is also achieved.

[0066] Specifically, in order to ensure the light emitting effect of the display module provided in the embodiment of the present application, the light collecting layer can also be arranged on the side of the pixel unit away from the driving circuit layer of the array substrate, so as to improve the light emitting rate and light emitting effect of the pixel unit.

[0067] See Figure 4 In this embodiment, taking the total length of the width of the equivalent area of ​​the cab in the vehicle as S=1.25m as an example, the temperature in different areas of the cab may be the same or different. The distance between the position of the installation panel in front of the cab and the driver is approximately D=0.5m. When detecting the temperature in the cab, it is equivalent to the distance between the detected object and the display module being detected being 0.5m. At the same time, the object to be detected includes a first detection area S1 and a second detection area S2. When detecting, the thermal detection modules 103 under two different second pixel units 772 detect the two detection areas respectively. After detection, the temperature of the first detection area S1 of the object to be detected is 40°, and the temperature of the second detection area S2 is 80°. Therefore, the temperature in different areas can be monitored by different thermal detection modules 103 in the temperature measuring device, thereby further improving the detection efficiency and accuracy of the display module provided in the embodiment of the utility model.

[0068] In the embodiment of the utility model, when the array substrate and the corresponding driving circuit layer corresponding to the display module are arranged, they can be arranged directly on a glass substrate or on a silicon substrate. When arranged on a silicon substrate, the size of each pixel unit can be further reduced. For example, when a silicon-based panel is used, the pixel area of ​​each pixel unit is 96.4mm. 2 When a glass substrate is used, the corresponding pixel area of ​​each pixel unit is 820mm 2 . And then by changing different materials and processes, the resolution and display effect can be further improved.

[0069] Furthermore, the embodiment of the utility model also provides a vehicle-mounted temperature measurement electronic device, wherein the vehicle-mounted temperature measurement electronic device includes the array substrate or display module provided in the embodiment of the utility model, and a heat detection module is correspondingly arranged in the temperature measurement electronic device, so as to ensure that the panel can detect the temperature of the detected object while displaying normally. Thereby improving the detection effect and accuracy of the vehicle-mounted temperature measurement electronic device and ensuring the comprehensive performance of the device.

[0070] Specifically, the array substrate or display module provided in the embodiments of the present application can also be applied to any product or component with temperature detection function or other functions, such as mobile phones, computers, electronic paper, displays, wearable devices, etc., and the specific type is not specifically limited.

[0071] In summary, the above is a detailed introduction to an array substrate and a display module provided by an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the utility model. Although the utility model is disclosed as above in the preferred embodiments, the above preferred embodiments are not used to limit the utility model. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model is based on the scope defined by the claims.

Claims

1. An array substrate, characterized in that: include: Driving circuit layer; as well as, A heat detection module is arranged on one side of the driving circuit layer, and a light filtering layer is also arranged on the side of the heat detection module away from the driving circuit layer, and the light filtering layer is arranged in alignment with the heat detection module.

2. The array substrate according to claim 1, characterized in that: The thermal detection module comprises: an amplifier circuit, electrically disposed on the driving circuit layer; a heat detection unit, disposed on the amplifying circuit; and The light absorbing layer is arranged on the heat detection unit.

3. The array substrate according to claim 2, characterized in that: The thermal detection module further comprises a light collecting layer, and the light collecting layer is arranged on a side of the light absorbing layer away from the thermal detection unit.

4. The array substrate according to claim 2, characterized in that: The projection of the light absorbing layer on the driving circuit layer is located within the projection area of ​​the heat detection unit on the driving circuit layer.

5. The array substrate according to claim 2, characterized in that: The heat detection unit includes a thermistor, and the resistivity of the thermistor is set to 2.5%~5% / K.

6. A display module, characterized in that: The display module includes an array substrate, and the array substrate includes: a driving circuit layer; and, A heat detection module is arranged on one side of the driving circuit layer, and a light filtering layer is also arranged on the side of the heat detection module away from the driving circuit layer, and the light filtering layer is arranged in alignment with the heat detection module.

7. The display module according to claim 6, characterized in that: The display module further comprises a pixel unit, wherein the pixel unit is arranged on the array substrate, and the heat detection module is correspondingly arranged on a side of the pixel unit away from the matching substrate.

8. The display module according to claim 7, characterized in that: The light filtering layer of the detection module corresponds to the pixel unit, and the light filtering layer is at least arranged in a region above a portion of the pixel unit.

9. The display module according to claim 8, characterized in that: The pixel unit includes a first pixel unit and a second pixel unit; The light filter layer is correspondingly arranged on the light-emitting side of the second pixel unit, and the wavelength range through which the light filter layer passes is 8um~14um.

10. The display module according to claim 6, characterized in that: The display module also includes: The light filtering layer is arranged on a side of the box substrate close to the array substrate.

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