Projection testing device

Abstract

The invention provides a projection testing device, which comprises a testing screen plate with a plurality of sliding grooves, a plurality of sliding blocks, a plurality of first sliding blocks and a plurality of second sliding blocks, and a plurality of first sliding blocks and a plurality of second sliding blocks which are slidably embedded in the sliding grooves in a one-to-one correspondence manner, the plurality of sensors are arranged on the plurality of sliding blocks in a one-to-one correspondence manner, the plurality of sensors comprise a plurality of first sensors and a plurality of second sensors, the first sensors are arranged on the first sliding blocks, and the second sensors are arranged on the second sliding blocks; the first connecting rod and the second connecting rod are in cross connection through a rotating shaft, and the rotating shaft is aligned with the center of the test screen board and is relatively fixed with the center of the test screen board; wherein the first sliding block is driven by one of the first connecting rod and the second connecting rod to move in the tangential direction relative to the rotating shaft, and the second sliding block is driven by two of the first connecting rod and the second connecting rod to move in the radial direction relative to the rotating shaft.

Description

Technical Field

[0001] This invention relates to a testing device for a projector, and more particularly to a projection testing device that can change the position of the testing sensor according to the size specifications of the projector's projection screen. Background Technology

[0002] To test the output image quality of a projector, optical information at multiple points on the screen is typically measured. This information is then used to further analyze and assess the output image quality, including brightness, brightness uniformity, and color. Currently, the most commonly used standards are the 13-point and 29-point measurement methods established by the American National Standards Institute (ANSI).

[0003] Existing methods include moving the sensor sequentially to the aforementioned points for measurement, or deploying sensors at each point for simultaneous measurement. However, when changing to different screen ratios, existing testing equipment cannot be adjusted to match the sensors with the new screen ratio. This requires creating new molds to manufacture the corresponding testing equipment, readjusting the positions, or occupying additional space on the production line, thus increasing production costs. Summary of the Invention

[0004] The purpose of this invention is to provide a projection testing device that can adjust the position of each sensor according to different aspect ratios of the test screen, so that the testing device can meet the testing of projection screens with different aspect ratios.

[0005] According to one aspect of the present invention, a projection testing device is provided, comprising: a test screen plate including a plurality of grooves, wherein a plurality of sliders are slidably embedded in the plurality of grooves in a one-to-one correspondence, wherein the plurality of sliders includes a plurality of first sliders and a plurality of second sliders; a plurality of sensors, each corresponding to one of the plurality of sliders, wherein the plurality of sensors includes a plurality of first sensors and a plurality of second sensors, wherein the first sensors are disposed on the first sliders and the second sensors are disposed on the second sliders; and a first link and a second link, the first link and the second link being cross-connected by a pivot, wherein the pivot is aligned with the center of the test screen plate and fixed relative to the center of the test screen plate; wherein the first slider is driven by one of the first link and the second link to move tangentially relative to the pivot, and the second slider is driven by two of the first link and the second link to move radially relative to the pivot.

[0006] Preferably, the first slider is coupled to one of the first link and the second link via a universal joint.

[0007] Preferably, the second slider is coupled to the first link via a third link, and is coupled to the second link via a fourth link.

[0008] Preferably, the plurality of sliders further includes a plurality of third sliders, and the plurality of sensors further includes a plurality of third sensors disposed on the third sliders, which are driven by one of the first link and the second link to move non-tangentially and non-radially relative to the axis of rotation.

[0009] Preferably, the third slider is coupled to one of the first and second links via a fifth link.

[0010] Preferably, it also includes a first driver for driving the first link and the second link to rotate relative to the rotating shaft, thereby driving the multiple sensors to switch between detection positions at different screen ratios.

[0011] Preferably, the movable branch of the first actuator moves along the angle bisector of the angle between the first link and the second link, and the movable branch is coupled to the first link and the second link respectively through the sixth link and the seventh link; or, the first actuator drives a rod to move along the angle bisector of the angle between the first link and the second link, and the rod is coupled to the first link and the second link respectively through the sixth link and the seventh link.

[0012] Preferably, it also includes a second driver for driving the first driver to move; the second driver is combined with the first driver to drive the plurality of sensors to switch between detection positions in three or four frame ratios.

[0013] Preferably, the plurality of sensors are disposed on the first side of the test screen panel, and the first connecting rod and the second connecting rod are disposed on the second side of the test screen panel; the first side of the test screen panel is also provided with a screen ratio mark to indicate the area of ​​the projected screen receiving the projector.

[0014] According to another aspect of the present invention, a projection testing device is provided, comprising: a test screen plate including a plurality of sliding grooves, wherein a plurality of sliders are slidably embedded in the plurality of sliding grooves in a corresponding manner; a plurality of sensors, which are correspondingly disposed in the plurality of sliders; a first link and a second link, which are cross-connected by a pivot, and the pivot is aligned with the center of the test screen plate and fixed relative to the center of the test screen plate; and a first driver and a second driver with connected strokes, wherein the strokes of the first driver and the second driver coincide with the angle bisector of an angle between the first link and the second link, and the first driver and the second driver cooperate to drive the plurality of sensors to move along corresponding sliding grooves to switch between detection positions of three or four screen ratios.

[0015] The projection testing device provided by this invention uses a first and second connecting rod to drive a coupled slider, which in turn moves a sensor along a slide groove. This allows switching between different point combinations, enabling parallel sensing and measurement of corresponding screen positions required for testing different screen ratios. Since the same projection testing device can complete parallel sensing and measurement of multiple screen ratios, it reduces the space occupied on the production line and allows for rapid switching to the required screen ratio measurement point, thus improving production line measurement efficiency. Attached Figure Description

[0016] Figure 1 This is a front side view of a projection testing device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the rear side of a projection testing device according to an embodiment of the present invention; Figure 3 for Figure 2 A partial structural diagram of the area within the dashed line A. Detailed Implementation

[0017] To provide a further understanding of the purpose, structure, features and functions of the present invention, detailed descriptions are provided below with reference to embodiments.

[0018] Certain terms are used in the specification and claims to refer to specific elements. It will be understood by those skilled in the art that manufacturers may use different names to refer to the same element. This specification and claims do not distinguish elements by differences in name, but rather by differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to".

[0019] Reference Figures 1 to 3 The diagram illustrates a projection testing apparatus according to an embodiment of the present invention, including a test screen plate 10, a first connecting rod 21, a second connecting rod 22, and a plurality of sensors 30. The test screen plate 10 includes a plurality of sliding grooves 13 and a plurality of sliders 14, each slider 14 being correspondingly embedded in one of the sliding grooves 13 and capable of relative sliding. The plurality of sensors 30 are correspondingly disposed on the plurality of sliders 14. The first connecting rod 21 and the second connecting rod 22 are cross-connected by a pivot R, which is aligned with the center S of the test screen plate 10 and its position is fixed relative to the center S. When the first connecting rod 21 and the second connecting rod 22 are driven to rotate relative to each other, the sliders 14 are driven to move along the corresponding sliding grooves 13.

[0020] In a preferred embodiment, the plurality of slides 13 include a first slide 131 and a second slide 132, the first slide 131 extending tangentially relative to the center S, and the second slide 132 extending radially relative to the center S. The plurality of sliders 14 include a first slider 141 and a second slider 142, the first slider 141 being embedded in the first slide 131, and the second slider 142 being embedded in the second slide 132. The first slider 141 is driven by one of the first connecting rod 21 and the second connecting rod 22 to move tangentially relative to the center S, that is, the first slider 141 is driven by either the first connecting rod 21 or the second connecting rod 22 to move tangentially relative to the rotation axis R. The second slider 142 is driven by two of the first connecting rod 21 and the second connecting rod 22 to move radially relative to the center S, that is, to move radially relative to the rotation axis R. The first connecting rod 21 and the second connecting rod 22 may be located on the second side 12 (i.e., the back side) of the test screen panel 10, and the sensor 30 is positioned facing outwards towards the first side 11 (i.e., the front side) to sense light. The power supply and transmission line of sensor 30 can be passed through the opening of slider 14 or the gap between slider 14 and slide groove 13, so as to be led from the second side 12 to the test host. The power supply and transmission line of sensor 30 can also be led from the first side 11 to the test host, but partial fixing and avoidance measures are required to avoid mechanical interference or obstruction of the field of view of sensor 30 due to movement.

[0021] like Figure 2 As shown, one first slider 141 is rotatably coupled to the first connecting rod 21, and the other first slider 141, symmetrically positioned, is rotatably coupled to the second connecting rod 22. The first slider 141 can be directly and rotatably coupled to the first connecting rod 21 or the second connecting rod 22 via a universal joint. Preferably, the first groove 131 is located in the area swept by the first connecting rod 21 or the second connecting rod 22, and the first slider 141 overlaps with the first connecting rod 21 or the second connecting rod 22. In other embodiments, the first slider 141 can also be indirectly and rotatably coupled via a universal joint or a connecting rod fixed to the first connecting rod 21 or the second connecting rod 22, thereby achieving tangential movement to change the position of the first sensor 31 without being limited by the positions of the first connecting rod 21 and the second connecting rod 22. That is, one end of the connecting rod is rotatably coupled to the first slider 141 via a universal joint, and the other end of the connecting rod is fixed to the first connecting rod 21 or the second connecting rod and cannot rotate relative to it.

[0022] like Figure 2As shown, the second slider 142 is coupled to the first link 21 via the third link 23, and to the second link 22 via the fourth link 24. Thus, the two sets of linkages together drive the second slider 142 to move radially along the relative axis of rotation R. That is, both ends of the third link 23 can rotate relative to the second slider 142 and the first link 21 respectively, and both ends of the fourth link 24 can rotate relative to the second slider 142 and the second link 22 respectively. Preferably, the second groove 132 and the second slider 142 are located on the bisector of the angle between the intersection of the first link 21 and the second link 22.

[0023] In a preferred embodiment, the slide groove 13 further includes a third slide groove 133, which extends non-tangentially and non-radially relative to the center S. The slider 14 further includes a third slider 143, which is slidably embedded in the third slide groove 133. The plurality of sensors 30 also include a third sensor 33, which is disposed on the third slider 143. Based on this, the third slider 143 is driven by the first link 21 or the second link 22 to move non-tangentially and non-radially relative to the center S (i.e., relative to the rotation axis R). The third slider 143 is coupled to the first link 21 or the second link 22 via a fifth link 25. That is, both ends of the fifth link 25 can rotate relative to the third slider 143 and the first link 21 (or the second link 22), respectively.

[0024] The first link 21 and the second link 22 can be rotated manually or electrically.

[0025] In a preferred embodiment, the projection testing device further includes a first driver 41, which can drive the first link 21 and the second link 22 to rotate relative to the rotation axis R, thereby driving the multiple sensors 30 to switch between detection positions at different screen ratios. Preferably, the movable branch of the first driver 41 moves along the bisector of an angle between the intersection of the first link 21 and the second link 22. Figure 2 and Figure 3As shown, the movable branch of the first actuator 41 moves along the bisector of the angle between the lower sides of the first link 21 and the second link 22. The movable branch is coupled to the first link 21 via the sixth link 26 and to the second link 22 via the seventh link 27, thereby driving the first link 21 and the second link 22 to rotate simultaneously, thus driving multiple sensors 30 to switch between detection positions of two screen ratios. In another embodiment, the first actuator 41 drives a rod to move along the bisector of the angle between the intersection of the first link 21 and the second link 22. This rod moves along the bisector of the angle between the lower sides of the first link 21 and the second link 22. This rod is coupled to the first link 21 via the sixth link 26 and to the second link 22 via the seventh link 27, thereby driving the first link 21 and the second link 22 to rotate simultaneously. The first actuator 41 can be a cylinder, which can reciprocate linearly between two positions when driven. The first driver 41 can also be a motor, which directly or indirectly drives a threaded rod to move linearly back and forth between at least two positions.

[0026] In a preferred embodiment, the projection testing device includes a first driver 41 and a second driver 42, such as Figure 2 and Figure 3 As shown, the strokes of the first actuator 41 and the second actuator 42 are connected in series, thereby jointly driving multiple sensors 30 to switch between detection positions at three or four screen ratios. The fixed support of the first actuator 41 can be fixed to the movable support of the second actuator 42, and the body of the first actuator 41 can also be fixed to another rod driven by the second actuator 42; however, this invention is not limited thereto. Preferably, the combined stroke of the first actuator 41 and the second actuator 42 extends along (or coincides with) an angle bisector of the angle between the intersection of the first connecting rod 21 and the second connecting rod 22. The first actuator 41 and the second actuator 42 can be cylinders, which reciprocate linearly between two positions when driven. Taking the first actuator 41 and the second actuator 42 as cylinders as an example: when the first actuator 41 and the second actuator 42 are fully retracted, multiple sensors 30 are in a detection position with a 4:3 aspect ratio; when the first actuator 41 is extended and the second actuator 42 is retracted, multiple sensors 30 are in a detection position with a 16:10 aspect ratio; when the first actuator 41 and the second actuator 42 are fully extended, multiple sensors 30 are in a detection position with a 16:9 aspect ratio.

[0027] Preferably, the first side 11 (i.e., the front side) of the test screen panel 10 is also provided with a screen ratio mark 111 to indicate the area of ​​the projected image receiving the projector. For example... Figure 1As shown, the projection position corresponding to the screen ratio is marked with a complete frame line; in other embodiments, the projection position corresponding to the screen ratio can also be marked with partial frames such as corner frames, middle frames, or points, but this invention is not limited thereto. The screen ratio corresponding to the complete frame line mark or the partial mark can also be clearly indicated by text markings.

[0028] In addition, sensor 30 also includes a fourth sensor 34, which is disposed at the center S of test screen panel 10 for sensing the light at the center of the projected image. The fourth sensor 34 can be disposed on the slider 14 embedded in the slide groove 13, or it can be directly disposed on the first side 11S of test screen panel 10.

[0029] In summary, this invention provides a projection testing device that uses a first and second connecting rod, which are cross-connected, to drive a coupled slider, causing a sensor to move along a slide groove. This allows switching between different point combinations, enabling parallel sensing and measurement of corresponding screen positions required for testing different screen ratios. Since a single projection testing device can perform parallel sensing and measurement of multiple screen ratios, it reduces the space occupied on the production line and allows for rapid switching to the required screen ratio measurement point, improving production line measurement efficiency.

[0030] Although the invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the invention and should not be construed as limiting the invention. The scale in the schematic drawings does not represent the actual proportions of the components, in order to clearly describe the required parts.

[0031] The present invention has been described in the above-described embodiments; however, these embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. Conversely, any modifications and refinements made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. A projection testing device, characterized in that, include: The test screen panel includes multiple sliding grooves and multiple sliders, with the sliders being slidably embedded in the multiple sliding grooves in a one-to-one correspondence; wherein the multiple sliders include multiple first sliders and multiple second sliders; Multiple sensors are correspondingly disposed on the multiple sliders; wherein the multiple sensors include multiple first sensors and multiple second sensors, the first sensors being disposed on the first slider and the second sensors being disposed on the second slider; and A first link and a second link are connected by a pivot, which is aligned with the center of the test screen and fixed relative to the center of the test screen. The first slider is driven by one of the first link and the second link to move tangentially relative to the axis of rotation, and the second slider is driven by the other two of the first link and the second link to move radially relative to the axis of rotation.

2. The projection testing device as described in claim 1, characterized in that, The first slider is coupled to one of the first and second links via a universal joint.

3. The projection testing device as described in claim 1, characterized in that, The second slider is coupled to the first link via a third link, and is coupled to the second link via a fourth link.

4. The projection testing device as described in claim 1, characterized in that, The plurality of sliders also includes a plurality of third sliders, and the plurality of sensors also includes a plurality of third sensors disposed on the third sliders, which are driven by one of the first link and the second link to move non-tangentially and non-radially relative to the axis of rotation.

5. The projection testing device as described in claim 4, characterized in that, The third slider is coupled to one of the first and second links via the fifth link.

6. The projection testing device as described in claim 1, characterized in that, It also includes a first driver, which drives the first link and the second link to rotate relative to the rotating shaft, thereby driving the multiple sensors to switch between detection positions at different screen ratios.

7. The projection testing apparatus as described in claim 6, characterized in that, The movable support of the first actuator moves along the angle bisector of the angle between the first link and the second link, and the movable support is coupled to the first link and the second link respectively through the sixth link and the seventh link; or, the first actuator drives a rod to move along the angle bisector of the angle between the first link and the second link, and the rod is coupled to the first link and the second link respectively through the sixth link and the seventh link.

8. The projection testing device as described in claim 6, characterized in that, It also includes a second driver for driving the first driver to move; the second driver is combined with the first driver to drive the plurality of sensors to switch between detection positions in three or four frame ratios.

9. The projection testing device as described in claim 1, characterized in that, The multiple sensors are disposed on the first side of the test screen panel, and the first connecting rod and the second connecting rod are disposed on the second side of the test screen panel; the first side of the test screen panel is also provided with a screen ratio mark to indicate the area of ​​the projected screen receiving the projector.

10. A projection testing device, characterized in that, include: The test screen panel includes multiple sliding grooves, and multiple sliders are slidably embedded in the multiple sliding grooves in a corresponding manner. Multiple sensors are installed on the multiple sliders in a one-to-one correspondence; A first link and a second link are connected by a pivot, which is aligned with and fixed relative to the center of the test screen. The first and second drives are connected in series, and the stroke of the first and second drives coincides with the angle bisector of the angle between the first and second links. The first and second drives cooperate to drive the multiple sensors to move along the corresponding slide to switch between detection positions with three or four screen ratios.

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