Clamp for testing driving time sequence of liquid crystal display screen
By designing a fixture with its own backlight plate, using an adjustable probe module and multiple test needles, the problems of low efficiency and poor compatibility of LCD display driver timing test are solved, and efficient and accurate multi-size compatibility testing is achieved.
Patent Information
- Application Number
- CN202421674279.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-07-16
AI Technical Summary
The prior art is inefficient when testing the driving timing of LCD screens, and is difficult to be compatible with LCD screens of different sizes, which are prone to miscalculation and waste of resources.
A clamp with its own backlight plate is designed, including a probe module with adjustable position and multiple test needles, which can be connected to multiple test points at the same time, adapting to different sizes of LCD screens, simplifying the testing process.
It realizes efficient and accurate LCD display driver timing test, is compatible with multiple sizes, reduces miscalculation and resource waste, and improves testing efficiency.
Smart Images
Figure CN223123064U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit board testing, in particular to a fixture applied to test the driving timing of a liquid crystal display screen. Background Art
[0002] In recent years, many displays use thin-film transistor liquid crystal display screens. Such displays have high clarity, sensitive response, comfortable vision, and low cost, and are highly sought after. However, in the development stage of a thin-film transistor liquid crystal display screen, it is necessary to first press-fit and bond a display driver chip on a display panel, and then press-fit and bond a flexible printed circuit board, and finally form a liquid crystal display screen. In order to ensure the normal display of the display panel module, it is necessary to power on and debug and test the driving timing of the display panel.
[0003] Currently, the traditional measurement method is to light the liquid crystal display screen with a display test box, place an external backlight at the bottom of the panel, and then use an oscilloscope supported by a rack to measure the test points on the display panel. With this method, at most 2 test points can be measured each time on a small-sized display panel. When there are many test points on the display panel and the distances between multiple test points are relatively dense, the method of repeatedly moving the oscilloscope channels for testing has low efficiency and is prone to mis-poking and mis-measurement, resulting in repeated measurements. Therefore, there is an urgent need for a test tool with higher test efficiency and capable of compatible auxiliary measurement of liquid crystal display screens of various different sizes. Summary of the Utility Model
[0004] In view of the above problems, the utility model provides a fixture for testing the driving timing of a liquid crystal display screen, which enables higher test efficiency for the driving timing of the liquid crystal display screen and is compatible with various liquid crystal display screen sizes.
[0005] In one embodiment of the utility model, a fixture for testing the driving timing of a liquid crystal display screen is provided, which is characterized in that it includes: a bottom plate; a backlight plate, the backlight plate is arranged on the bottom plate, and a power supply or a power supply interface is also arranged on the bottom plate, and the power supply or the power supply interface is used to provide electrical energy to the backlight plate to make the backlight plate emit light; a cover plate, two slot holes are opened on the cover plate, and a probe module is detachably arranged in each slot hole, the position of the probe module in the slot hole is adjustable, the probe module includes a plurality of probes, a liquid crystal display screen to be tested can be placed between the cover plate and the backlight plate, the liquid crystal display screen to be tested includes a display panel, the display panel includes a plurality of test points, and by adjusting the position of the probe module, the plurality of probes can be pressed against the plurality of test points on the display panel of the liquid crystal display screen to be tested; a plurality of test pins are also arranged on the bottom plate, the plurality of probes pressed against the plurality of test points are connected to the plurality of test pins, and the plurality of test pins are used to connect a plurality of oscilloscopes for testing the driving timing of the to-be-displayed panel.
[0006] In some embodiments, the multiple test pins are arranged as a double row of test pins. The multiple probes in one slot hole are connected to one row of test pins, and the multiple probes in the other slot hole are connected to the other row of test pins.
[0007] In some embodiments, a plurality of positioning posts are provided on the bottom plate.
[0008] In some embodiments, the probe module further includes an adjusting rod and an adjusting slider disposed on the adjusting rod. The multiple probes are fixed on the adjusting slider. Rotating the adjusting rod can cause the adjusting slider to slide along the adjusting rod to drive the positions of the multiple probes to be adjustable.
[0009] In some embodiments, the probe module further includes an adjusting spring. The adjusting spring is disposed on a side of the adjusting slider away from the adjusting rod, and the adjusting spring abuts against the inner side wall of the slot hole.
[0010] In some embodiments, the two slot holes are symmetrically disposed on the cover plate surface. A third slot hole is further provided on the cover plate surface, and the third slot hole corresponds to the display panel fixed by the fixture.
[0011] In some embodiments, both the backlight panel and the cover plate are made of transparent plastic.
[0012] In some embodiments, the cover plate is a magnetic cover plate.
[0013] In some embodiments, the cover plate is marked with scales.
[0014] The fixture for testing the driving timing of a liquid crystal display screen in the technical solution of the embodiment of the present invention has a built-in backplane, and the backplane is also used to fix the liquid crystal display screen to be tested together with the cover plate, so that when testing the test points of the display panel, there is no need to externally connect a backplane, and the fixed support of the liquid crystal display screen to be tested can be ensured. The probe module is movably disposed in the slot hole, and an efficient timing test can be realized for liquid crystal display screens of different sizes at one time.
[0015] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the following specifically describes the embodiments of the present invention. Description of the Drawings
[0016] Upon reading the following detailed description of the preferred embodiments, various other advantages and benefits will become apparent to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:
[0017] Figure 1 is an exploded view of a fixture for testing the driving timing of a liquid crystal display screen according to some embodiments of the present utility model;
[0018] Figure 2 is a top view of a fixture for testing the driving timing of a liquid crystal display screen according to some embodiments of the present utility model;
[0019] Figure 3 is a side view of a fixture for testing the driving timing of a liquid crystal display screen according to some embodiments of the present utility model;
[0020] Figure 4 is a schematic diagram of a fixture for testing the driving timing of a liquid crystal display screen according to some embodiments of the present utility model for fixing the liquid crystal display screen to be tested.
[0021] The reference numerals in the specific embodiments are as follows:
[0022] Base plate 10, positioning post 101;
[0023] Backlight plate 20;
[0024] Cover plate 30, slot hole 301;
[0025] Probe module 40, adjusting rod 401, adjusting slider 402, probe 403, adjusting spring 404;
[0026] Liquid crystal display screen to be tested 50, test needle 60, power interface 70. Specific embodiments
[0027] The embodiments of the technical solution of the present utility model will be described in detail below with reference to the drawings. The following embodiments are only used to illustrate the technical solution of the present utility model more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present utility model.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "including" and "having" and any variations thereof in the specification and claims of the present utility model and the above drawings are intended to cover non-exclusive inclusion.
[0029] In the description of the embodiments of the present utility model, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present utility model, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.
[0030] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present utility model. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0031] In the description of the embodiments of the present utility model, the term "a plurality of" means more than two (including two). Similarly, "a plurality of groups" means more than two groups (including two groups), and "a plurality of sheets" means more than two sheets (including two sheets).
[0032] Traditional fixtures for testing the timing of display panels need to be externally connected to a backlight board and are connected to an oscilloscope through a simple rack support. Since the oscilloscope has only two or four test channels, only two test points of the display panel can be tested each time. To completely test a display panel, the oscilloscope channels need to be moved multiple times, resulting in low efficiency and being prone to misconnection and incorrect measurement, thus requiring repeated measurement. In addition, when using only 2 channels of the oscilloscope to test the timing waveform, it is not intuitive enough to organize the documents, and there is a waste of channel resources. Moreover, the rack support is not fixed, and accidental contact with the rack during the measurement process is likely to scratch the display panel, resulting in the scrapping of the entire flexible glass printed circuit.
[0033] The fixture for testing the driving timing of a liquid crystal display screen in the present utility model is a test tool that enables higher efficiency in testing the driving timing of the liquid crystal display screen and is compatible with various sizes of liquid crystal display screens.
[0034] As Figures 1-4 shown, a fixture for testing the driving timing of a liquid crystal display screen is provided, including: a bottom plate 10; a backlight board 20, the backlight board 20 is disposed on the bottom plate 10, and a power supply or a power supply interface 70 is further disposed on the bottom plate 10, and the power supply or the power supply interface 70 is used to supply electrical energy to the backlight board 20 to make the backlight board 20 emit light. A power supply interface 70 is disposed on the bottom plate 10, which can connect to the mains power supply to light the white backlight, and the liquid crystal display module does not need to be externally connected to a backlight for display.
[0035] The fixture further includes a cover plate 30, and two slot holes 301 are formed in the cover plate 30. Each of the slot holes 301 is detachably provided with a probe 403 module 40, and the position of the probe 403 module 40 in the slot hole 301 is adjustable. The probe 403 module 40 includes a plurality of probes 403. In some embodiments, there are multiple types of probe 403 modules 40, and the number of probes 403 included in different types of probe 403 modules 40 and the spacing between the probes 403 are different, so that different types of probe 403 modules 40 can be adapted to the test points in display panels of various sizes to be tested. In other embodiments, one or more probe 403 modules can be assembled in the probe 403 module 40. Each probe 403 module includes a plurality of probes 403, and the probe 403 module 40 can be adapted to the test points in display panels of various sizes to be tested by increasing or decreasing the probe 403 modules in the probe 403 module 40.
[0036] A liquid crystal display screen 50 to be tested can be placed between the cover plate 30 and the backlight plate 20. The liquid crystal display screen 50 to be tested includes a display panel, and the display panel includes a plurality of test points. By adjusting the position of the probe 403 module 40, the plurality of probes 403 can be pressed against the plurality of test points of the display panel in the liquid crystal display screen 50 to be tested; a plurality of test pins 60 are also arranged on the bottom plate 10, and the plurality of probes 403 pressed against the plurality of test points are connected to the plurality of test pins 60. The plurality of test pins 60 are used to connect a plurality of oscilloscopes for testing the driving timing of the display panel to be tested.
[0037] In the fixture of this embodiment, by providing a larger number of probes 403 with adjustable positions, the probes 403 can be more flexibly pressed against all the test points on display panels of various sizes to be tested. Further, through the connection between the probes 403 and the test pins 60, and the connection between the test pins 60 and the plurality of oscilloscopes, the plurality of oscilloscopes can simultaneously perform timing tests on all the test points on the display panel to be tested, and an efficient test can be achieved at one time.
[0038] In some embodiments, the plurality of test pins 60 are arranged as a double-row test pin 60. The plurality of probes 403 in one slot hole 301 are connected to one row of test pins 60, and the plurality of probes 403 in the other slot hole 301 are connected to the other row of test pins 60.
[0039] In some embodiments, a plurality of positioning posts 101 are provided on the bottom plate 10. As Figures 1-3 shown, there are 4 positioning posts 101, which are used to stably fix the liquid crystal display screen 50 to be tested.
[0040] In some embodiments, as Figure 1As shown, the probe 403 module 40 further includes an adjusting rod 401 and an adjusting slider 402 disposed on the adjusting rod 401. The plurality of probes 403 are fixed on the adjusting slider 402. Rotating the adjusting rod 401 can cause the adjusting slider 402 to slide along the adjusting rod 401 to drive the positions of the plurality of probes 403 to be adjustable. The adjusting rod 401 is a threaded adjusting rod 401.
[0041] Furthermore, the probe 403 module 40 further includes an adjusting spring 404. The adjusting spring 404 is disposed on a side of the adjusting slider 402 away from the adjusting rod 401. The adjusting spring 404 abuts against the inner sidewall of the slot hole 301, and the cover plate 30 is marked with scales. In some embodiments, the cover plate 30 is marked with scales at a distance of 0.5 mm. The distance between the elastic probe 403 modules 40 on the left and right sides is adjustable and replaceable, and is compatible with various sizes of liquid crystal display screens 50 to be tested.
[0042] In some embodiments, the two slot holes 301 are symmetrically disposed on the plate surface of the cover plate 30. A third slot hole is further disposed on the plate surface of the cover plate 30, and the third slot hole corresponds to the display panel fixed by the fixture. By providing the third slot hole at a position of the cover plate 30 corresponding to the display panel, the viewing of the display panel is made more convenient. The above-mentioned fixture is generally portable, easy to use, has no cumbersome structure, and can adapt to most application scenarios.
[0043] In some embodiments, both the backlight plate 20 and the cover plate 30 are made of transparent plastic, which facilitates the viewing of the display panel during testing.
[0044] In some embodiments, the cover plate 30 is a magnetic cover plate 30. After the liquid crystal display screen 50 to be tested is placed in the fixture, closing the transparent magnetic cover and fixing the four silicone columns can stably and reliably fix the liquid crystal display screen 50 to be tested.
[0045] The usage method of the fixture in the above embodiments is as follows: The overall material is transparent plastic. Connect it to the commercial power supply externally, and it can be lit with pure white backlight at the bottom. The measurement object placed inside the bottom plate is the liquid crystal display screen to be tested that is connected to the display test box to display images. Subsequently, place 4 silicone columns to fix the liquid crystal display screen to be tested, connect the probe module of the corresponding size, connect the upper circuit of the probe module to the test needle, adjust the distance between the left and right spring probe modules according to the scale so that it corresponds to the test points of the display panel. After adjusting the position, close the magnetic fixture cover. At this time, all channels of the oscilloscope (generally, an oscilloscope has four channels, and the more channels there are, the more test points can be measured and the higher the efficiency) can be hooked to the test needle to measure the test timing of the display panel, or multiple oscilloscopes can be used to measure together, and the waveform measurement is more complete. Thus, the test timing can be debugged more efficiently and error-free on the display test box, and the display can be debugged and the display failure can be analyzed. If testing liquid crystal display screens to be tested of different sizes and models, only need to replace the probe module and perform the above operations again.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.
Claims
1. A fixture for testing the driving timing of a liquid crystal display screen, characterized in that, Comprising: Bottom plate; Backlight plate, the backlight plate is arranged on the bottom plate, and a power supply or a power interface is also arranged on the bottom plate, and the power supply or the power interface is used to provide electrical energy to the backlight plate to make the backlight plate emit light; Cover plate, two slot holes are opened on the cover plate, and a probe module is detachably arranged in each slot hole, the position of the probe module in the slot hole is adjustable, the probe module includes a plurality of probes, and a liquid crystal display screen to be tested can be placed between the cover plate and the backlight plate, the liquid crystal display screen to be tested includes a display panel, the display panel includes a plurality of test points, and by adjusting the position of the probe module, the plurality of probes can be pressed against the plurality of test points of the display panel in the liquid crystal display screen to be tested; A plurality of test pins are also arranged on the bottom plate, the plurality of probes pressed against the plurality of test points are connected to the plurality of test pins, and the plurality of test pins are used to connect a plurality of oscilloscopes for testing the driving timing of the display panel.
2. The fixture for testing the driving timing of a liquid crystal display screen according to claim 1, wherein The plurality of test pins are arranged as a double-row test pin, the plurality of probes in one slot hole are connected to one row of test pins, and the plurality of probes in the other slot hole are connected to the other row of test pins.
3. The fixture for testing the driving timing of a liquid crystal display screen according to claim 1, wherein A plurality of positioning posts are arranged on the bottom plate.
4. The fixture for testing the driving timing of a liquid crystal display screen according to any one of claims 1-3, characterized in that, The probe module further includes an adjusting rod and an adjusting slider arranged on the adjusting rod, the plurality of probes are fixed on the adjusting slider, and rotating the adjusting rod can make the adjusting slider slide along the adjusting rod to drive the position of the plurality of probes to be adjustable.
5. The fixture for testing the driving timing of a liquid crystal display screen according to claim 4, characterized in that, The probe module further includes an adjusting spring, the adjusting spring is arranged on the side of the adjusting slider away from the adjusting rod, and the adjusting spring abuts against the inner side wall of the slot hole.
6. The fixture for testing the driving timing of a liquid crystal display screen according to claim 1, wherein The two slot holes are symmetrically arranged on the cover plate surface, and a third slot hole is also arranged on the cover plate surface, and the third slot hole corresponds to the display panel fixed by the fixture.
7. The fixture for testing the driving timing of a liquid crystal display screen according to claim 1, characterized in that, Both the backlight plate and the cover plate are transparent plastics.
8. The fixture for testing the driving timing of a liquid crystal display screen according to claim 1, wherein The cover plate is a magnetic cover plate.
9. The fixture for testing the driving timing of a liquid crystal display screen according to claim 1, characterized in that, The cover plate is marked with scales.