CN203644366U - Testing apparatus of response time of display screen - Google Patents
Testing apparatus of response time of display screen Download PDFInfo
- Publication number
- CN203644366U CN203644366U CN201320703665.XU CN201320703665U CN203644366U CN 203644366 U CN203644366 U CN 203644366U CN 201320703665 U CN201320703665 U CN 201320703665U CN 203644366 U CN203644366 U CN 203644366U
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- display screen
- response time
- sampling resistor
- proving installation
- photodiode
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- 230000004044 response Effects 0.000 title claims abstract description 31
- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 238000005070 sampling Methods 0.000 claims abstract description 27
- 238000009434 installation Methods 0.000 claims description 21
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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Abstract
The utility model discloses a testing apparatus of response time of a display screen. The testing apparatus is characterized in that photodiodes (U1, U2) are connected in series with a sampling resistor (R1) respectively; two ends of the sampling resistor (R1) are connected to an oscilloscope so that voltage waveform changes of the sampling resistor (R1) are sampled. Therefore, a test of the response time of the display screen is realized. With the adoption of the above structure, the testing apparatus of the response time of the display screen has the advantages that 1) the structure is simple and thus the test cost is reduced to the largest degree; 2) the size is small and thus the testing apparatus is easy to operate; and 3) the accuracy is high and test values are accurate.
Description
Technical field
The utility model relates to the performance test field of display screen, the particularly proving installation of a kind of display screen response time.
Background technology
The response time of display screen is that display module switches back and forth the needed time between Hei Chang and white field, it is the important parameter of display screen performance, before dispatching from the factory, need the response time of every screen to test, only after test passes, display screen can come into operation.
The test response time is to utilize high-end testing apparatus to test mostly at present, although ratio of precision is higher, cost is higher, and volume is larger, is unfavorable for detecting.If utilize stopwatch to test, error is larger.If utilize optical sensor, the voltage at direct-detection sensor two ends, is interfered than being easier to, and test error is larger.
For the problems referred to above, a kind of lower-cost proving installation is provided, it is the problem that prior art need to solve that the response time of display screen is carried out accurately measuring.
Utility model content
Technical problem to be solved in the utility model is to provide the proving installation of a kind of display screen response time, to reach the object of being carried out to accurate measurement the response time of display screen.
For achieving the above object, the technical solution of the utility model is, the proving installation of a kind of display screen response time, it is characterized in that: described proving installation is that photodiode U1, U2 connect mutually with sampling resistor R1, the two ends of sampling resistor R1 are connected to oscillograph the voltage waveform of sampling resistor R1 are changed and sampled, thereby realize the test to the display screen response time.
Described photodiode U1, U2 and sampling resistor R1 are welded on pcb board, and pcb board is installed to sucker inside.
Described proving installation adsorbs display screen surface by sucker in the time of test, and photodiode U1, U2 are facing to display screen.
Described sucker is black vacuum cup.
The model of described photodiode U1, U2 is S9674.
The resistance of described sampling resistor R1 is 3M Ω, and rated power is 0.25W.
The proving installation of display screen response time, owing to adopting above-mentioned structure, the utility model has the advantage of: 1, simple in structure, farthest reduce testing cost; 2, volume is little, easy operating; 3, degree of accuracy is high, and test number is accurate.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail;
Fig. 1 is the circuit diagram of the proving installation of a kind of display screen response time of the utility model;
Fig. 2 is the structural representation of the proving installation of a kind of display screen response time of the utility model;
In Fig. 2,1, sucker; 2, pcb board.
Embodiment
The utility model utilizes two photodiode U1, U2 series connection and selects suitable sampling resistor R1 resistance, in the time that black and white field is switched, the voltage waveform at sampling resistor R1 two ends is tested, to realize the measurement to the display screen response time.
As shown in Figure 1, the utility model becomes electric energy by photodiode U1, U2 light energy conversion, is specifically reflected as the change in voltage of sampling resistor R1.Utilize two photodiode U1, U2 series connection and select suitable sampling resistor resistance, when black and white field is switched, the voltage waveform at sampling resistor R1 two ends changes and becomes greatly, reduces the interference of clutter, improves measuring accuracy.And install by sucker 1, whole invention is adsorbed on to screen surfaces, make whole device be adsorbed on screen surfaces, easy and simple to handle.
Be specifically described in conjunction with Fig. 2, the utility model is that photodiode U1, U2 connect mutually with sampling resistor R1, the two ends of sampling resistor R1 are drawn respectively a sample line voltage waveform of sampling resistor R1 are changed and sampled, photodiode U1, U2 become electric current light energy conversion, the electric current of the higher conversion of brightness is larger, and the voltage at resistance R 1 two ends is larger.Thereby realize the test to the display screen response time.Photodiode U1, U2 and sampling resistor R1 are welded on pcb board 2, and pcb board 2 is installed to sucker 1 inside.Proving installation adsorbs display screen surface by sucker 1 in the time of test, and photodiode U1, U2 are facing to display screen.Wherein sucker 1 is black vacuum cup, and the model of photodiode U1, U2 is S9674, and the resistance of sampling resistor R1 is 3M Ω, and rated power is 0.25W.
Because the utility model is for surveying the response time, so can not carry out filtering with electric capacity in circuit, clutter is unavoidable, and verification experimental verification uses a photodiode not increase clutter.Test records the utility model check point clutter 35mv left and right.If only use a photodiode, module brightness display module is in the time of 500cd/m2, and black time, R1 both end voltage is in 267mv left and right, white time, R1 both end voltage is in 375mv left and right, pressure reduction 108mv, measures the corresponding time while being the change in voltage time, is easily subject to the interference of 35mv clutter.If use two photodiodes, module brightness is in the time of 500cd/m2, and black time, R1 both end voltage is in 192mv left and right, and white time, R1 both end voltage is in 735mv left and right, and pressure reduction 543mv, is not subject to the interference of 35mv clutter substantially.The brightness of display module is generally between (500-1000) cd/m2, and along with the increase of brightness, pressure reduction also can progressively increase, and with respect to substantially constant clutter, pressure reduction is larger, and test Vietnamese side just, accurately.If with three photodiodes or more, detecting effect can be better, but the volume of whole device can become large.Particularly some little screen products, cannot measure.
Following table is the voltage difference at sampling resistor R1 two ends in the situation that of different resistance:
From upper watch test data, can find out: while selecting 3M ohm, sampling resistor R1 Bai Chang and black both end voltage pressure reduction maximum, be applicable to the test of response time.
In the time testing, first opening power, adjusts display module and signal is opened required voltage, and gives display module and signal card power supply, and product is normally worked, the changeable field signal of signal card.Open oscillograph, be connected to the two ends of sampling resistor R1.Response time proving installation, firmly by shielding center at display module, the sucker of response time proving installation can be adsorbed on screen firmly.Press the field switching push button on signal card, while catching black to white to transform with oscillograph simultaneously, the change in voltage waveform at R1 two ends.Then uprise the needed time with oscillographic cursor read-out voltage waveform by low, i.e. the response time of black to white.Press the field switching push button on signal card, while catching white to black to transform with oscillograph simultaneously, the change in voltage waveform at sampling resistor R1 two ends.Then use oscillographic cursor read-out voltage waveform by the needed time of high step-down, i.e. the response time of white to black.
By reference to the accompanying drawings the utility model is exemplarily described above; obviously the utility model specific implementation is not subject to the restrictions described above; as long as the various improvement that adopted technical solutions of the utility model to carry out; or directly apply to other occasion without improvement, all within protection domain of the present utility model.
Claims (6)
1. the proving installation of a display screen response time, it is characterized in that: described proving installation is that photodiode U1, U2 connect mutually with sampling resistor R1, the two ends of sampling resistor R1 are connected to oscillograph the voltage waveform of sampling resistor R1 are changed and sampled.
2. the proving installation of a kind of display screen response time according to claim 1, is characterized in that: it is upper that described photodiode U1, U2 and sampling resistor R1 are welded on pcb board (2), and pcb board (2) is installed to sucker (1) inside.
3. the proving installation of a kind of display screen response time according to claim 1 and 2, is characterized in that: described proving installation is by sucker (1) absorption display screen surface in the time of test, and photodiode U1, U2 are facing to display screen.
4. the proving installation of a kind of display screen response time according to claim 2, is characterized in that: described sucker (1) is black vacuum cup.
5. the proving installation of a kind of display screen response time according to claim 1, is characterized in that: the model of described photodiode U1, U2 is S9674.
6. the proving installation of a kind of display screen response time according to claim 1, is characterized in that: the resistance of described sampling resistor R1 is 3M Ω, and rated power is 0.25W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320703665.XU CN203644366U (en) | 2013-11-08 | 2013-11-08 | Testing apparatus of response time of display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320703665.XU CN203644366U (en) | 2013-11-08 | 2013-11-08 | Testing apparatus of response time of display screen |
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| Publication Number | Publication Date |
|---|---|
| CN203644366U true CN203644366U (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320703665.XU Expired - Lifetime CN203644366U (en) | 2013-11-08 | 2013-11-08 | Testing apparatus of response time of display screen |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866575A (en) * | 2016-03-30 | 2016-08-17 | 中车株洲电力机车研究所有限公司 | Vehicle-borne display device comprehensive testing device and testing method |
| CN109949726A (en) * | 2019-03-25 | 2019-06-28 | 山西高科华瑞电子科技有限公司 | A kind of LED display mould group automatic white balance debugging system and adjustment method |
| CN110412379A (en) * | 2019-07-31 | 2019-11-05 | 惠州市德赛西威汽车电子股份有限公司 | A kind of test method of instrument function response time |
| CN110927476A (en) * | 2019-10-19 | 2020-03-27 | 中国航空工业集团公司洛阳电光设备研究所 | High-precision display delay testing device and method |
-
2013
- 2013-11-08 CN CN201320703665.XU patent/CN203644366U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105866575A (en) * | 2016-03-30 | 2016-08-17 | 中车株洲电力机车研究所有限公司 | Vehicle-borne display device comprehensive testing device and testing method |
| CN109949726A (en) * | 2019-03-25 | 2019-06-28 | 山西高科华瑞电子科技有限公司 | A kind of LED display mould group automatic white balance debugging system and adjustment method |
| CN110412379A (en) * | 2019-07-31 | 2019-11-05 | 惠州市德赛西威汽车电子股份有限公司 | A kind of test method of instrument function response time |
| CN110927476A (en) * | 2019-10-19 | 2020-03-27 | 中国航空工业集团公司洛阳电光设备研究所 | High-precision display delay testing device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |