Display module detection jig with photosensitive element

Abstract

The utility model discloses a display module detection jig with a photosensitive element, which is characterized in that a power switch is designed into a hinge shape, an LED light source for testing the photosensitive element is fixed on an upper hinge, the LED light source is provided with a black silica gel protective sleeve, the protective sleeve is made of soft materials, and when the switch is closed, the semi-permeable ink silk-screen area of a glass cover plate can be completely covered. Interference of external environment light on the quantity of light penetrating through the semi-through hole is isolated, whether light sensing of the photosensitive element is normal or not is detected, photosensitive sensing defective products are screened out, and the product quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of display screen detection, in particular to a detection fixture for a display module with a photosensitive element. Background Art

[0002] Some in-vehicle display module products are equipped with ALS photosensitive devices to sense the external ambient light and adjust the brightness of the LCD display module according to the brightness of the ambient light. There are photosensitive elements applied in some in-vehicle display module products. The glass protection cover plate corresponding to the photosensitive element has a silk-screened semi-transparent ink, and the visible light band transmittance is very low, while the infrared band transmittance is very high, more than 70% (850nm). The production and inspection rely on the ambient light of the production line. The light source, the distance from the light source to the module, the brightness of the display module, etc. will all interfere with the test results. Due to the instability of the light source, the accuracy of the defective inspection of the produced products is low, and it is impossible to screen out the defective products with photosensitive induction problems, thus ensuring the product quality. Content of the Utility Model

[0003] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a detection fixture for a display module with a photosensitive element. By designing the power switch in the shape of a hinge, the LED light source for testing the photosensitive element is fixed to the upper hinge. When the LED light source on the upper hinge is connected to the drive circuit on the lower hinge, the LED light source can be lit. The LED light source is equipped with a black silicone protective cover, and the protective cover is made of soft material. When the switch is closed, it can completely cover the semi-transparent ink silk-screened area of the glass cover plate, isolating the interference of the external ambient light on the light quantity transmitted through the semi-transparent holes, thereby detecting whether the photosensitive element is sensitive normally, screening out the defective products with photosensitive induction problems, and ensuring the product quality.

[0004] The technical problem to be solved by the utility model is realized through the following technical solutions: A detection fixture for a display module with a photosensitive element, comprising: an upper hinge, on the surface of one side opposite to the lower hinge, there are an LED light source and an upper metal elastic sheet, and the LED light source and the upper metal elastic sheet are electrically connected;

[0005] A lower hinge, which is linked to the upper hinge through a hinge shaft. On the surface of one side opposite to the upper hinge, there are a lower metal elastic sheet, a drive circuit, and a test slot for carrying the display module. The display module is equipped with a photosensitive element, and the lower metal elastic sheet and the drive circuit are electrically connected;

[0006] When the upper hinge and the lower hinge are closed relatively, the LED light source is aligned with the photosensitive element of the display module, and the upper metal elastic sheet and the lower metal elastic sheet come into contact and conduct, so that the LED light source is connected to the drive circuit and lit.

[0007] As a preferred implementation manner of the detection fixture for a display module with a photosensitive element provided by the utility model, it further comprises: a silicone cover, which is arranged around the LED light source.

[0008] As a preferred embodiment of the display module detection fixture with a photosensitive element provided by the present utility model, the silica gel cover is a horn-shaped light-tight silica gel.

[0009] As a preferred embodiment of the display module detection fixture with a photosensitive element provided by the present utility model, the LED light source and the upper metal spring piece are respectively located on both sides of the upper hinge.

[0010] As a preferred embodiment of the display module detection fixture with a photosensitive element provided by the present utility model, the upper metal spring piece includes a positive upper spring piece and a negative upper spring piece; the lower metal spring piece includes a positive lower spring piece and a negative lower spring piece. The positive upper spring piece corresponds to the positive lower spring piece, and the negative upper spring piece corresponds to the negative lower spring piece. The positive upper spring piece, the positive lower spring piece, the negative upper spring piece, and the negative lower spring piece together constitute the power switch of the LED light source and the separation switch of the upper hinge and the lower hinge.

[0011] As a preferred embodiment of the display module detection fixture with a photosensitive element provided by the present utility model, the upper hinge is further provided with an upper magnet beside the upper metal spring piece;

[0012] The lower hinge is further provided with a lower magnet beside the lower metal spring piece;

[0013] When the upper hinge and the lower hinge are closed relatively, the upper magnet and the lower magnet are magnetically attracted to each other to fix the upper hinge and the lower hinge.

[0014] As a preferred embodiment of the display module detection fixture with a photosensitive element provided by the present utility model, the display module includes a surface cover plate, and the photosensitive element is located on the lower surface of the surface cover plate.

[0015] As a preferred embodiment of the display module detection fixture with a photosensitive element provided by the present utility model, the photosensitive element is connected to the driving circuit through an FPC.

[0016] As a preferred embodiment of the display module detection fixture with a photosensitive element provided by the present utility model, a semi-transparent ink layer is screen-printed at the position of the surface cover plate corresponding to the photosensitive element.

[0017] As a preferred embodiment of the display module detection fixture with a photosensitive element provided by the present utility model, when the upper hinge is closed, the silica gel cover correspondingly completely covers the photosensitive element on the lower surface of the surface cover plate.

[0018] The utility model has the following beneficial effects: A display module detection fixture with a photosensitive element, comprising: an upper hinge, on the surface of one side opposite to the lower hinge, there are an LED light source and an upper metal elastic sheet, and an electrical connection is provided between the LED light source and the upper metal elastic sheet; a lower hinge, which is linked to the upper hinge through a hinge shaft, on the surface of one side opposite to the upper hinge, there are a lower metal elastic sheet, a driving circuit, and a test slot for carrying the display module, the display module is provided with a photosensitive element, and an electrical connection is provided between the lower metal elastic sheet and the driving circuit; when the upper hinge and the lower hinge are closed relatively, the LED light source is aligned with the photosensitive element of the display module, and the upper metal elastic sheet and the lower metal elastic sheet are in contact and conduct, so that the LED light source is connected to the driving circuit and lights up. In this application, the power switch is designed in the shape of a hinge, the LED light source for testing the photosensitive element is fixed to the upper hinge, when the LED light source on the upper hinge is connected to the driving circuit on the lower hinge, the LED light source can be lit up, the LED light source is equipped with a black silicone protective cover, the material of the protective cover is soft, when the switch is closed, it can completely cover the semi-transparent ink printing area of the glass cover plate, isolate the interference of external ambient light on the light quantity passing through the semi-transparent holes, and then detect whether the photosensitive element is sensitive normally, screen out the defective products with poor light sensitivity, and ensure the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the solutions in this application, the following will briefly introduce the drawings required for use in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of the display module detection fixture with a photosensitive element provided by the utility model;

[0021] Figure 2 It is a schematic cross-sectional structural diagram of the display module detection fixture with a photosensitive element provided by the utility model;

[0022] Figure 3 It is a schematic use diagram of the display module detection fixture with a photosensitive element provided by the utility model;

[0023] Figure 4 It is a schematic structural diagram of the photosensitive element of the display module detection fixture with a photosensitive element provided by the utility model.

[0024] 1. Upper hinge; 11. Lower hinge; 2. LED light source; 31. Positive upper elastic sheet; 32. Negative upper elastic sheet; 311. Positive lower elastic sheet; 321. Negative lower elastic sheet; 310. First elastic sheet switch; 320. Second elastic sheet switch; 4. Hinge shaft; 5. Silicone cover; 6. FPC; 61. Photosensitive element; 7. Cover plate. Detailed implementation mode

[0025] The present utility model will be described in detail below in conjunction with the accompanying drawings and embodiments. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0027] In addition, the terms "first", "second", "third" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0028] In the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation", "setting", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may also be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] Embodiment 1

[0030] As Figure 1 and Figure 2 shown, a display module detection jig with a photosensitive element includes: an upper hinge 1, on the surface of which opposite to the lower hinge 11, there are an LED light source 2 and an upper metal spring piece, and an electrical connection is provided between the LED light source 2 and the upper metal spring piece;

[0031] The lower hinge 11 is connected to the upper hinge 1 through a hinge shaft 4. On the surface of the lower hinge 11 opposite to the upper hinge 1, there are a lower metal elastic sheet, a driving circuit, and a test slot for carrying the display module. The display module is equipped with a photosensitive element, and the lower metal elastic sheet and the driving circuit are electrically connected.

[0032] When the upper hinge 1 and the lower hinge 11 are closed relative to each other, the LED light source 2 is aligned with the photosensitive element of the display module, and the upper metal elastic sheet and the lower metal elastic sheet come into contact and conduct, so that the LED light source 2 is connected to the driving circuit and lights up.

[0033] In this application, a hinge switch is set to connect to the power switch of the display module to be detected, and the LED light source 2 for testing the photosensitive element 61 is fixed to the upper hinge 1. The LED light source 2 is equipped with a black silicone cover 5. The silicone cover 5 is made of soft material. When the hinge is closed, it can completely cover the semi-transparent ink printing area of the glass cover plate 7, isolating the interference of external ambient light on the light quantity passing through the semi-transparent holes, and then detecting whether the photosensitive element is sensitive normally, screening out defective products with poor light sensitivity, and ensuring product quality. Among them, through the structure setting of the upper and lower hinge elastic sheets, not only can the hinge be opened and closed, but also the LED light source 2 on the upper hinge 1 can be connected to the driving circuit on the lower hinge to light up the LED light source 2.

[0034] Further, the display module detection jig with a photosensitive element of the present utility model further includes: a silicone cover 5, which is arranged around the LED light source 2.

[0035] Further, the silicone cover 5 is a horn-shaped light-tight silicone.

[0036] The silicone cover 5 is a horn-shaped light-tight silicone and the silicone cover 5 is a black silicone protective cover.

[0037] Through the above structural design, the silicone cover 5 can completely cover the light-transmitting area of the glass cover plate. Its light-tight characteristic is used to block light and protect the internal photosensitive element from external light interference, thereby ensuring the stability of the light source and excluding the interference of external ambient light. When the silicone cover 5 is closed with the hinge switch, the stress applied on the surface of the surface cover plate 7 is weak, which can better protect the display module and ensure product quality.

[0038] Further, the LED light source 2 and the upper metal elastic sheet are respectively located on both sides of the upper hinge 1.

[0039] Further, as Figure 3 shown, when the upper hinge 1 is closed, the silicone cover 5 completely covers the photosensitive element 61 on the lower surface of the surface cover plate 7 correspondingly.

[0040] In another preferred implementation of this embodiment, the hinge shaft 4 connects the upper hinge and the lower hinge so that the two can rotate relative to each other, thereby realizing the opening and closing operation of the detection fixture. At the same time, the hinge shaft 4 can also provide certain support and stability to ensure that the detection fixture will not become loose or shaken during use, and can also reduce the stress acting on the surface cover of the display module to ensure that the screen is not damaged.

[0041] Embodiment 2

[0042] In this embodiment, the upper metal spring sheet includes a positive upper spring sheet 31 and a negative upper spring sheet 32; the lower metal spring sheet includes a positive lower spring sheet 311 and a negative lower spring sheet 321, the positive upper spring sheet 31 corresponds to the positive lower spring sheet 311, the negative upper spring sheet 32 ​​corresponds to the negative lower spring sheet 321, the positive upper spring sheet 31, the positive lower spring sheet 311, the negative upper spring sheet 32 ​​and the negative lower spring sheet 321 together constitute the power switch of the LED light source and the separation switch of the upper hinge and the lower hinge.

[0043] During the test, the upper hinge is covered on the lower hinge by hand, and the positive upper spring sheet 31 contacts the positive lower spring sheet 311 to connect the positive circuit between the light source LED and the driving circuit, and the negative upper spring sheet 32 ​​contacts the negative lower spring sheet 321 to connect the negative circuit between the light source LED and the driving circuit; after the test is completed, the hand is removed from the upper hinge, and the upper hinge and the lower hinge are separated under the elastic force between the upper metal spring sheet and the lower metal spring sheet.

[0044] Furthermore, the upper hinge 1 is also provided with an upper magnet located next to the upper metal spring;

[0045] The lower hinge 11 is also provided with a lower magnet located next to the lower metal spring;

[0046] When the upper hinge 1 and the lower hinge 11 are relatively closed, the upper magnet and the lower magnet are magnetically attracted to each other to fix the upper hinge 1 and the lower hinge 11 .

[0047] Among them, the upper metal spring and the lower metal spring are metal springs. When the springs are pressed down, the upper and lower metal springs contact circuit is turned on. When the springs are bounced up, the upper and lower metal spring circuits are insulated and disconnected, thereby realizing the function of lighting up and turning off the LED power supply.

[0048] After the test is completed, the upper hinge is manually pried apart from the lower hinge to separate the upper magnet from the lower magnet, thereby opening the upper hinge and the lower hinge.

[0049] Furthermore, if Figure 4 As shown, the display module includes a surface cover plate 7 , and the photosensitive element 61 is located on the lower surface of the surface cover plate 7 .

[0050] Among them, the photosensitive element is an integrated circuit integrating photosensitive elements. It can sense the intensity of light and convert it into an electrical signal. Photosensitive elements are usually used in applications such as photosensitive sensors, photoelectric controllers, and photoelectric switches. It can automatically adjust the working state of the circuit when the light changes, and has a wide range of application fields, such as lighting control, security monitoring, and photoelectric communication. The working principle of the photosensitive element is to utilize the photoelectric effect of the photosensitive element to convert light into an electrical signal, and process and control it through an integrated circuit. This photosensitive element integrating photosensitive elements has the advantages of small size, low power consumption, and high sensitivity, so it has been widely used in modern electronic products.

[0051] Further, the photosensitive element 61 is connected to the control circuit through the FPC6.

[0052] Further, a semi-transparent ink layer is screen-printed on the surface cover plate 7 corresponding to the photosensitive element 61. Among them, the visible light band transmittance of the semi-transparent area of the surface cover plate 7 is very low, and the transmittance in the infrared band is very high, more than 70% at 850 nm.

[0053] Embodiment III

[0054] The display module detection jig provided by this application, wherein the lower hinge is the main body of the electrical measurement fixture, the sample is assembled inside the electrical measurement fixture, and the main body of the electrical measurement fixture is provided with an FPGA driving device and a backlight driving device for lighting the display module.

[0055] In this embodiment, the upper computer of the display module detection jig communicates through the I2C serial port, addresses the I2C device address and register address of the photosensitive element, and reads the corresponding value; the upper computer judges the read value and displays the detection result on the display module.

[0056] Among them, I2C (Inter-Integrated Circuit) is a two-way communication protocol, usually used to connect microcontrollers and external devices, such as sensors, memories, and displays. It communicates through two wires (clock line SCL and data line SDA), supports multiple hosts sharing the same bus, and has a low communication rate and simple hardware connection. I2C serial communication is a flexible and simple communication method, suitable for connecting multiple devices for data exchange and control.

[0057] In another implementation manner of this embodiment, the display module detection jig can drive the display module through the first elastic sheet switch 310, thereby facilitating the QC personnel to perform function / appearance inspection;

[0058] In another implementation manner of this embodiment, the backlight module can also be driven through the second elastic sheet switch 320, and the backlight NTC resistor is detected through the ADC sampling circuit, and the detection result is output;

[0059] A photosensitive component is an integrated circuit that can convert the received optical signal into an electrical signal. In fixture detection, the photosensitive component is mainly used for photosensitive ALS detection, that is, to detect whether the product is photosensitive normally. This detection has an important impact on the quality of the product because photosensitive ALS detection can be used to determine whether the product is OK.

[0060] In this embodiment, the display module detection fixture communicates with the photosensitive component through I2C to detect whether the photosensitive component is photosensitive normally, and is used to determine whether the product is OK. The result of the photosensitive ALS detection will be displayed on the display module, so that QC personnel can conveniently perform function and appearance inspections.

[0061] In this application, fixing the LED light source 2 to the upper hinge 1 ensures the unity of the light source. The interference of ambient light is removed by the silica gel cover 5. The design of the hinge switch makes the distance between the LED light source 2 and the photosensitive component 61 consistent. Furthermore, the display module detection fixture can more accurately screen out products with poor light sensitivity, ensuring product quality.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention and are not intended to limit them. Although the embodiments of the present invention have been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the embodiments of the present invention can still be modified or equivalently replaced, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display module detection fixture with a photosensitive element, characterized in that: include: An upper hinge (1), a surface of which is opposite to the lower hinge (11) and is provided with an LED light source (2) and an upper metal spring, wherein the LED light source (2) and the upper metal spring are electrically connected; A lower hinge (11) is connected to the upper hinge (1) via a hinge shaft (4), and a surface on one side opposite to the upper hinge (1) is provided with a lower metal spring, a drive circuit, and a test slot for carrying a display module, wherein the display module has a photosensitive element, and the lower metal spring and the drive circuit are electrically connected; When the upper hinge (1) and the lower hinge (11) are relatively closed, the LED light source (2) is aligned with the photosensitive element of the display module, and the upper metal spring sheet and the lower metal spring sheet are in contact and conductive, so that the LED light source (2) is connected to the drive circuit and lights up.

2. The display module detection fixture with a photosensitive element as claimed in claim 1, characterized in that: Also includes: A silicone cover (5) is arranged around the LED light source (2).

3. The display module detection fixture with a photosensitive element as claimed in claim 2, characterized in that: The silicone cover (5) is trumpet-shaped, light-proof silicone.

4. The display module detection fixture with a photosensitive element as claimed in claim 1, characterized in that: The LED light source (2) and the upper metal spring are respectively located on two sides of the upper hinge (1).

5. The display module detection fixture with a photosensitive element as claimed in claim 1, characterized in that: The upper metal spring sheet comprises a positive upper spring sheet (31) and a negative upper spring sheet (32); the lower metal spring sheet comprises a positive lower spring sheet (311) and a negative lower spring sheet (321); the positive upper spring sheet (31) corresponds to the positive lower spring sheet (311), the negative upper spring sheet (32) corresponds to the negative lower spring sheet (321); the positive upper spring sheet (31), the positive lower spring sheet (311), the negative upper spring sheet (32) and the negative lower spring sheet (321) together constitute a power switch of the LED light source and a separation switch of the upper hinge and the lower hinge.

6. The display module detection fixture with a photosensitive element as claimed in claim 1, characterized in that: The upper hinge (1) is also provided with an upper magnet located next to the upper metal spring; The lower hinge (11) is also provided with a lower magnet located next to the lower metal spring; When the upper hinge (1) and the lower hinge (11) are relatively closed, the upper magnet and the lower magnet are magnetically attracted to each other to fix the upper hinge (1) and the lower hinge (11).

7. The display module detection fixture with a photosensitive element as claimed in claim 1, characterized in that: The display module comprises a surface cover plate (7), and the photosensitive element (61) is located on the lower surface of the surface cover plate (7).

8. The display module detection fixture with a photosensitive element as claimed in claim 7, characterized in that: The photosensitive element (61) is connected to the driving circuit via an FPC (6).

9. The display module detection fixture with a photosensitive element as claimed in claim 7, characterized in that: A semi-transparent ink layer is silk-screened on the surface cover plate (7) at a position corresponding to the photosensitive element (61).

10. The display module detection fixture with a photosensitive element as claimed in claim 7, characterized in that: Also includes: A silicone cover (5) is arranged around the LED light source (2); when the upper hinge (1) is closed, the silicone cover (5) completely covers the photosensitive element (61) on the lower surface of the surface cover plate (7).

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