CN104360185A - LCM (liquid crystal module) electric measurement function expansion device - Google Patents
LCM (liquid crystal module) electric measurement function expansion device Download PDFInfo
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- CN104360185A CN104360185A CN201410597745.0A CN201410597745A CN104360185A CN 104360185 A CN104360185 A CN 104360185A CN 201410597745 A CN201410597745 A CN 201410597745A CN 104360185 A CN104360185 A CN 104360185A
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Abstract
The invention provides an LCM (liquid crystal module) electric measurement function expansion device. The LCM electric measurement function expansion device comprises a feedback signal processor, and a transfer base plate and a relay which are connected with the feedback signal processor, wherein the transfer base plate is connected with an LCM image display signal source and an LCM to be electrically measured, the LCM image display signal source is used to generate an image display drive signal and send the image display drive signal to the LCM to be electrically measured, the LCM to be electrically measured is used to receive the image display drive signal and send all electric signal parameters to the transfer base plate, the transfer base plate converts an arrangement mode of all the different electric signal parameters into a unified arrangement mode, and then sends all the electric signal parameters to the feedback signal processor, and the feedback signal processor detects the electric signal parameters and judges whether the electric signal parameters are abnormal. The LCM electric measurement function expansion device can monitor various electrical indexes of the LCM while the LCM is being electrically measured, automatically interrupts LCM measurement and sends an audible and visual alarm when abnormality occurs, and prevents abnormal products from flowing out.
Description
Technical field
The present invention relates to field of liquid crystal display, be specifically related to a kind of LCM(liquid crystal display module) electrical measurement function expanding device.
Background technology
LCM electrical measurement refers to by LCM picture display source signal, and drive LCM to show various picture, whether employee normally judges the Presentation Function of LCD according to set check criteria at different pictures, avoids defective products to flow out to client.
But, existing LCM picture display source signal can only drive LCM display frame, but to every electrical specifications of LCM, as identification voltage, data synchronizing signal, backlight synchronizing signal, consumption/back facet current etc., cannot monitor in real time, cause part picture normal but the product of electrical specifications exception cannot be investigated out in time, cause material and waste in man-hour, and cause customer evaluation to decline.
Summary of the invention
The object of the invention is to monitor the every electrical specifications of LCM (as identification voltage, data synchronizing signal, backlight synchronizing signal, consumption electric current and back facet current etc.) in LCM electrical measurement simultaneously, automatically interrupt LCM when occurring abnormal test and send sound and light alarm, avoid the product of electrical specifications exception.
For achieving the above object, the invention provides a kind of LCM electrical measurement function expanding device, this device comprises: feedback signal processor and connected interposer substrate and relay, the power module of electrical measurement LCM treated by described relay for connecting, described interposer substrate is respectively used to connect LCM picture display source signal and describedly treat electrical measurement LCM, described LCM picture display source signal is for generation of picture display drive signals, and treat electrical measurement LCM described in being sent to by described interposer substrate, describedly after receiving described picture display drive signals, carry out picture display until electrical measurement LCM, and its each electric signal parameter is sent to described interposer substrate, described interposer substrate sends described feedback signal processor to after variant electric signal Parameter Switch being become unified arrangement mode, described feedback signal processor detects described electric signal parameter and judges whether to exist extremely.
Preferably, described feedback signal processor comprises signal processing module and connected human-computer interaction module and memory module, described signal processing module is connected with described interposer substrate and described relay, for detecting described electric signal parameter and judging whether to exist extremely, described human-computer interaction module is for setting and showing the normal span of described electric signal parameter, and for showing described judged result, described memory module is for storing the normal span of described default electric signal parameter.
Preferably, described signal processing module is used for the value of described electric parameter and the normal span preset to compare, and the situation of the value of described electric signal parameter outside described normal span is regarded as electric signal abnormal parameters situation.
Preferably, described LCM electrical measurement function expanding device also comprises an alarm be connected with described signal processing module, for detecting that when described signal processing module described electric signal parameter issues out alarm signal in the control of described signal processing module when existing abnormal.
Preferably, described signal processing module, also for when detecting that described electric signal parameter exists abnormal, controls the connection cutting off described relay.
Tool of the present invention has the following advantages and beneficial effect:
1, electrical specifications abnormal products is effectively avoided to flow out to client;
2, when product connection is short-circuited extremely, expanding unit automatic cut-off power is avoided burning out product or LCM function inspection device.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, accompanying drawing required in describing embodiment is done simple introduction below, apparently, accompanying drawing described below is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is that the system of LCM electrical measurement function expanding device of the present invention and peripheral unit thereof connects block diagram.
Embodiment
Elaborate below in conjunction with the embodiment of Figure of description to the embodiment of the present invention.
Have various different LCM product on the market at present, as mobile phone, panel computer and televisor etc., liquid crystal display module LCM is all employ in LCM product, in order to avoid the LCM product stream of electrical specifications exception to market, need measure each electrical specifications of LCM and determine whether exception before LCM product export.Electrical specifications described in the present invention refers to the identification voltage of LCM, data synchronizing signal, backlight synchronizing signal, consumption electric current and back facet current respectively, and they have as given a definition:
Identification voltage: automatically identify that whether connected LCM model is correct for LCM product; Usually two specific resistance are had in LCM internal circuit, after two resistant series, one end is connected on the operating voltage VDD of LCM, one end is connected on ground wire GND, two resistance intermediate connections voltage is over the ground identification voltage, and the various combination of above-mentioned two resistances can obtain different identification voltage.
Data synchronizing signal: the voltage rectangular wave sent to LCM product mainboard by LCM, for notifying that the data processing before LCM product mainboard completes, can accept described mainboard and sending new data to LCM.
Backlight synchronizing signal: the voltage rectangular wave sent to LCM product mainboard by LCM, for notifying that LCM product mainboard prepares display next frame, if the backlight illumination of next frame picture needs to change, then can change backlight illumination by changing back facet current.
Consumption electric current: the electric current consumed during electronic component work in LCM except backlight except, has notable difference when the consumption electric current meeting of (short circuit, program error etc.) and normal condition when LCM internal circuit is abnormal.
Back facet current: the electric current consumed during the work of LCM backlight portion, has notable difference when the back facet current of (short circuit, program error etc.) and normal condition when backlight internal circuit is abnormal.
As shown in Figure 1, when the electrical specifications of LCM will be detected, described LCM is connected by such as Fig. 1 mode, wherein said interposer substrate is according to LCM product special designs, it is provided with multiple converting interface, the concrete connected mode of described LCM and described interposer substrate is: respectively from the identification voltage signal of LCM, data synchronizing signal, backlight synchronizing signal, consumption current signal and back facet current signal are flowed through position and above-mentioned each electric signal to be drawn by different lead-in wires and be connected to corresponding converting interface place in interposer substrate, it should be noted that, in order to avoid the interim adjustment of signal order of connection during Different L CM production switch, the type of the electric signal that each signal wire receives when PCB layout by described interposer substrate carries out correspondence and fixed arrangement, treat the above-mentioned identification voltage of electrical measurement LCM described in receive, data synchronizing signal, backlight synchronizing signal, when consumption current signal and back facet current signal, each transform electric is become unified arrangement mode by its fixing PCB layout mode and is transferred to feedback signal processor by interposer substrate, with the erroneous judgement risk that the efficiency and reduction signal wire wrong that improve conversion products cause, described feedback signal processor receives by after unified tactic each electric signal, by described unified order, each electric signal is detected, judge that whether each electric signal index is normal.
Priority between above-mentioned each electric signal puts in order can arbitrary arrangement, as long as the order of the detection of each electric signal is the same during each test.Such as, interposer substrate sets the first converting interface and is responsible for switching identification voltage signal when PCB layout, second converting interface is responsible for switched data synchronizing signal, 3rd converting interface is responsible for switching backlight synchronizing signal, 4th converting interface is responsible for switching consumption current signal and the 5th converting interface is responsible for switching back facet current signal, then when card extender will be connected to until electrical measurement LCM, according to setting above, each electric signal can be connected to respectively on the converting interface of the interposer substrate of its correspondence, the electric signal that each converting interface receives is transferred to signal processing module according to above-mentioned setting and carries out detecting and judging by interposer substrate.
The LCM electrical measurement function expanding device illustrating the application for identification voltage signal below how to treat that the electrical specifications of electrical measurement product is tested to LCM.Suppose that the identification voltage that certain LCM product specification book indicates is 3.2 ± 0.2V, then by the human-computer interaction interface of described LCM electrical measurement function expanding device, the identification voltage of normal range such as preset by keyboard and display screen input is 3.0 ~ 3.4V, also for abnormal when namely indicate identification identification voltage is less than 3.0V or is greater than 3.4V, described signal processing module receive input the normal span of identification voltage, and sent to memory module and stored, LCM picture display source signal produces digital signal and drives LCM product work and the default picture of display, identification voltage signal during LCM product work is sent to interposer substrate, described signal processing module is transmitted to after conversion, described signal processing module detects the identification magnitude of voltage U received, suppose to detect U=2.8V, now signal processing module calls the identification voltage 3.0 ~ 3.4V of the normal range stored in memory module, and by the described value detected compared with normal range value, find that the magnitude of voltage 2.8V detected is not within the normal span of described identification voltage, namely the identification voltage signal detected described in representing is abnormal, now signal processing module is sent corresponding control signal by instruction and sends alarm to respectively, as audible-visual annunciator and relay, audible-visual annunciator is made to send sound and light alarm, and make relay disconnect to cut off the power supply that described LCM treats electrical measurement product, described judged result shows by human-computer interaction module.
Similarly, data synchronizing signal, backlight synchronizing signal, consumption current signal and the detection mode of back facet current signal are also the actual value detected and the normal range value preset are compared, described in the actual value that detects not within normal range value, be then considered as exception.It should be noted that each concrete LCM product, the span of each electrical specifications of its LCM is all different, therefore, does not provide the concrete span of each electrical specifications in the application.
LCM electrical measurement function expanding device provided by the present invention can detect while electrical measurement whether the electrical specifications of LCM exists exception, picture can be effectively avoided to show normal but the LCM product of electrical specifications exception flows out to client, ensure product quality, improve user and evaluate.
The above embodiment only have expressed preferred embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (5)
1. a LCM electrical measurement function expanding device, it is characterized in that, described device comprises: feedback signal processor and connected interposer substrate and relay, the power module of electrical measurement LCM treated by described relay for connecting, described interposer substrate is respectively used to connect LCM picture display source signal and describedly treat electrical measurement LCM, described LCM picture display source signal is for generation of picture display drive signals, and treat electrical measurement LCM described in being sent to by described interposer substrate, describedly after receiving described picture display drive signals, carry out picture display until electrical measurement LCM, and its each electric signal parameter is sent to described interposer substrate, described interposer substrate sends described feedback signal processor to after variant electric signal Parameter Switch being become unified arrangement mode, described feedback signal processor detects described electric signal parameter and judges whether to exist extremely.
2. a kind of LCM electrical measurement function expanding device according to claim 1, it is characterized in that, described feedback signal processor comprises signal processing module and connected human-computer interaction module and memory module, described signal processing module is connected with described interposer substrate and described relay, for detecting described electric signal parameter and judging whether to exist extremely, described human-computer interaction module is for setting and showing the normal span of described electric signal parameter, and for showing described judged result, described memory module is for storing the normal span of described default electric signal parameter.
3. a kind of LCM electrical measurement function expanding device according to claim 2, it is characterized in that, described signal processing module is used for the value of described electric signal parameter and the normal span preset to compare, and it is abnormal the situation of the value of described electric signal parameter outside described normal span to be considered as electric parameter.
4. a kind of LCM electrical measurement function expanding device according to claim 3, it is characterized in that, described LCM electrical measurement function expanding device also comprises an alarm be connected with described signal processing module, for detecting that when described signal processing module described electric signal parameter issues out alarm signal in the control of described signal processing module when existing abnormal.
5. a kind of LCM electrical measurement function expanding device according to claim 4, is characterized in that, described signal processing module, also for when detecting that described electric signal parameter exists abnormal, controls the connection cutting off described relay.
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| CN201410597745.0A CN104360185A (en) | 2014-10-30 | 2014-10-30 | LCM (liquid crystal module) electric measurement function expansion device |
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| CN201410597745.0A CN104360185A (en) | 2014-10-30 | 2014-10-30 | LCM (liquid crystal module) electric measurement function expansion device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI587277B (en) * | 2016-04-19 | 2017-06-11 | 邱智彥 | A display mould applicable to various displays |
| CN110874292A (en) * | 2018-08-29 | 2020-03-10 | 中车株洲电力机车研究所有限公司 | Redundant display system |
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