CN201327703Y - Temperature compensating device and liquid crystal display module - Google Patents
Temperature compensating device and liquid crystal display module Download PDFInfo
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- CN201327703Y CN201327703Y CNU2008202349657U CN200820234965U CN201327703Y CN 201327703 Y CN201327703 Y CN 201327703Y CN U2008202349657 U CNU2008202349657 U CN U2008202349657U CN 200820234965 U CN200820234965 U CN 200820234965U CN 201327703 Y CN201327703 Y CN 201327703Y
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Abstract
The utility model is applicable to the field of the liquid crystal display, and provides a temperature compensating device and a liquid crystal display module. The temperature compensating device comprises a heat sensor unit, a first analog-to-digital conversion unit, a program processing unit, a second analog-to-digital conversion unit and a feedback control circuit, wherein the heat sensor unit converts the received temperature into an analog voltage signal; the first analog-to-digital conversion unit is connected with the heat sensor unit, and converts the analog voltage signal into a digital voltage signal; the program processing unit is connected with the first analog-to-digital conversion unit, and searches the control signal parameter corresponding to the digital voltage signal; the second analog-to-digital conversion unit is connected with the program processing unit, and converts the control signal parameter into a feedback voltage or current; the feedback control circuit is connected with the second analog-to-digital conversion unit, and feeds back the feedback voltage or current to the working voltage node of a liquid crystal device. In the utility model, with the first conversion of the analog-to-digital conversion unit, the corresponding searching of the program processing unit and the second conversion of the analog-to-digital conversion unit, the corresponding relation of the temperature and the feedback voltage or current is obtained, and the driving voltage curve required by the liquid crystal when the temperature changes is effectively simulated.
Description
Technical field
The utility model belongs to field of liquid crystal display, relates in particular to a kind of temperature compensation means and liquid crystal display module.
Background technology
Conventional liquid crystal display module, because the temperature characterisitic of liquid crystal itself, the operating voltage VOP of liquid crystal display device (VOPERATION) should change with temperature T, and the output voltage V EE of the electric pressure converter DC-DC Converter of generation VOP voltage is also relevant with temperature T, so must supply with the operating voltage of liquid crystal display device LCD with adjustment, to obtain good demonstration image quality.
Existing regulative mode comprises manual adjustments and automatically regulates, and the demonstration image quality that manual adjustments makes liquid crystal display device LCD by operating personnel's manual adjustment adjustable resistance is in the approval scope, and is very accurate, but not enough robotization; Automatically adjusting then adopts thermistor and resistor network to realize the temperature compensation of voltage, need not manual intervention, but the required driving voltage curve of liquid crystal when being difficult to the analog temperature change, and temperature compensation is accurate inadequately, cooperating liquid crystal can only mend high temperature or low temperature one end, and its debug process is carried out high cryogenic effect checking, length consuming time and process complexity because theoretical and actual gap need be revised resistor network repeatedly.
The utility model content
The purpose of this utility model is to provide a kind of temperature compensation means, and the temperature compensation mode that being intended to solve prior art provides is difficult to the problem of the effective analog temperature required driving voltage curve of liquid crystal when changing.
The utility model is achieved in that a kind of temperature compensation means, and described device comprises:
Receive the operating ambient temperature of liquid crystal display device, and be the thermal sensor unit of analog voltage signal temperature transition;
Be connected with described thermal sensor unit, described analog voltage signal be converted to the AD conversion unit of digital voltage signal;
Be connected with described AD conversion unit, search routine processes unit with the corresponding control signal parameter of described digital voltage signal by lookup table mode;
Be connected with described routine processes unit, with the described control signal Parameters Transformation D/A conversion unit that is feedback voltage or electric current; And
Be connected with described D/A conversion unit, with described feedback voltage or current feedback feedback control circuit to the operating voltage node of liquid crystal device.
Another purpose of the present utility model is to provide a kind of liquid crystal display module, and described liquid crystal display module comprises temperature compensation means, and described device comprises:
Receive the operating ambient temperature of liquid crystal display device, and be the thermal sensor unit of analog voltage signal temperature transition;
Be connected with described thermal sensor unit, described analog voltage signal be converted to the AD conversion unit of digital voltage signal;
Be connected with described AD conversion unit, search routine processes unit with the corresponding control signal parameter of described digital voltage signal by lookup table mode;
Be connected with described routine processes unit, with the described control signal Parameters Transformation D/A conversion unit that is feedback voltage or electric current; And
Be connected with described D/A conversion unit, with described feedback voltage or current feedback feedback control circuit to the operating voltage node of liquid crystal device.
In the utility model embodiment, by AD conversion unit change for the first time, the correspondence of routine processes unit is searched and the conversion operations second time of D/A conversion unit, obtain the corresponding relation of temperature and feedback voltage or electric current, the required driving voltage curve of liquid crystal is realized high-precision temperature compensation when effectively having simulated temperature change.
Description of drawings
Fig. 1 is the structured flowchart of the temperature compensation means that provides of the utility model embodiment;
Fig. 2 is the structural representation of the temperature compensation means that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
In the utility model embodiment, by AD conversion unit change for the first time, the correspondence of routine processes unit is searched and the conversion operations second time of D/A conversion unit, obtain the corresponding relation of temperature and feedback voltage or electric current, the required driving voltage curve of liquid crystal is realized high-precision temperature compensation when effectively having simulated temperature change.
Fig. 1 shows the structured flowchart of the temperature compensation means that the utility model embodiment provides, and has only provided the part relevant with the utility model embodiment for convenience of explanation among the figure, and wherein, temperature compensation means is built in the liquid crystal display module.
Temperature compensation means comprises thermal sensor unit, AD conversion unit, routine processes unit, D/A conversion unit and feedback control circuit, wherein, thermal sensor unit receives the operating ambient temperature of liquid crystal display device, and is analog voltage signal with temperature transition; AD conversion unit is connected with thermal sensor unit, and analog voltage signal is converted to digital voltage signal; The routine processes unit is connected with AD conversion unit, searches and the corresponding control signal parameter of digital voltage signal by lookup table mode; D/A conversion unit is connected with the routine processes unit, is feedback voltage or electric current with the control signal Parameters Transformation; Feedback control circuit is connected with D/A conversion unit, with feedback voltage or the current feedback operating voltage node to liquid crystal device.
In utility model embodiment, the routine processes unit is the MCU that single-chip microcomputer or ARM etc. have the routine processes function, but not in order to restriction the utility model.
In utility model embodiment, touch-screen control module, AD conversion unit and D/A conversion unit can be integrated in LCD controller or ARM system or other system, but not in order to restriction the utility model.
In the utility model embodiment, the degree of accuracy of temperature compensation depends on the conversion accuracy of AD conversion unit and D/A conversion unit, and the utility model embodiment adopts the D/A conversion unit of AD conversion unit and 8 precision of 10 precision, can provide 2
8=256 grades of adjustings, its degree of regulation reaches 5V/256=0.020V.
As a specific embodiment of the present utility model, Fig. 2 shows the structural representation of the temperature compensation means that the utility model embodiment provides, and for convenience of explanation, has only provided the part relevant with the utility model embodiment among the figure.
The utility model embodiment chooses AT89LV52 single-chip microcomputer, LCD controller RA8806 and supplies positive supply+VEE outward, wherein, thermal sensor unit comprises thermistor and divider resistance, the routine processes unit adopts the AT89LV52 single-chip microcomputer, and AD conversion unit is the touch-screen control module that is integrated among the LCD controller RA8806; D/A conversion unit comprises PWM unit and the electric capacity that is integrated in the LCD; Feedback control circuit comprises two-stage calculation amplifier.
In the utility model embodiment, the control signal parameter of VOP voltage and PWM cell translation has corresponding relation, corresponding relation by temperature T and VOP voltage, can get access to the control signal parameter of PWM cell translation and the corresponding relation between the temperature T, this corresponding relation is generated list storage in storer, the auto thermal compensation that the AT89LV52 single-chip microcomputer is realized liquid crystal display according to the control signal parameter and the corresponding relation between the temperature T of PWM cell translation.
By the temperature compensation means that the utility model embodiment provides, carry out the temperature compensation experiment, can adopt following a kind of mode:
Step 1: adopt outside voltage supply mode, voltage supplied outside the manual adjustment is adjusted VOP voltage accordingly under different temperature, thereby obtains the best VOP voltage at each temperature; In this embodiment, by adjusting the thermistor resistance of thermal sensor unit, the variation of analog temperature, thus get access to VOP voltage under the different temperatures;
Step 2: in the AT89LV52 single-chip microcomputer, increase interrupt routine, set up the corresponding relation between the control signal parameter of button interruption times and PWM cell translation.Under different temperature, by interrupting button, change the control signal parameter of PWM cell translation, thus the corresponding VOP voltage of control signal parameter of change and PWM cell translation.
In this embodiment, the mode that the temperature compensation means that provides by the utility model embodiment carries out the temperature compensation experiment is as just concrete embodiment, not in order to restriction the utility model.
The specific embodiment that the foregoing description provides for the utility model embodiment is not in order to restriction the utility model.
In the utility model embodiment, by AD conversion unit change for the first time, the correspondence of routine processes unit is searched and the conversion operations second time of D/A conversion unit, obtain the corresponding relation of temperature and operating voltage, the required driving voltage curve of liquid crystal when effectively having simulated temperature change, realize high-precision temperature compensation, simultaneously, it is simple that the temperature compensation means that provides by the utility model embodiment carries out the temperature compensation experimental implementation, offers convenience.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1, a kind of temperature compensation means is characterized in that, described device comprises:
Receive the operating ambient temperature of liquid crystal display device, and be the thermal sensor unit of analog voltage signal temperature transition;
Be connected with described thermal sensor unit, described analog voltage signal be converted to the AD conversion unit of digital voltage signal;
Be connected with described AD conversion unit, search routine processes unit with the corresponding control signal parameter of described digital voltage signal by lookup table mode;
Be connected with described routine processes unit, with the described control signal Parameters Transformation D/A conversion unit that is feedback voltage or electric current; And
Be connected with described D/A conversion unit, with described feedback voltage or current feedback feedback control circuit to the operating voltage node of liquid crystal device.
2, device as claimed in claim 1 is characterized in that, described thermal sensor unit comprises thermistor and divider resistance.
3, device as claimed in claim 1 is characterized in that, described routine processes unit is a single-chip microcomputer.
4, device as claimed in claim 1 is characterized in that, described AD conversion unit is the touch-screen control module that is integrated in the LCD controller; Described D/A conversion unit comprises PWM unit and the electric capacity that is integrated in the LCD.
5, device as claimed in claim 1 is characterized in that, described feedback control circuit comprises two-stage calculation amplifier.
6, a kind of liquid crystal display module is characterized in that, described liquid crystal display module comprises temperature compensation means, and described device comprises:
Receive the operating ambient temperature of liquid crystal display device, and be the thermal sensor unit of analog voltage signal temperature transition;
Be connected with described thermal sensor unit, described analog voltage signal be converted to the AD conversion unit of digital voltage signal;
Be connected with described AD conversion unit, search routine processes unit with the corresponding control signal parameter of described digital voltage signal by lookup table mode;
Be connected with described routine processes unit, with the described control signal Parameters Transformation D/A conversion unit that is feedback voltage or electric current; And
Be connected with described D/A conversion unit, with described feedback voltage or current feedback feedback control circuit to the operating voltage node of liquid crystal device.
7, liquid crystal display module as claimed in claim 6 is characterized in that, described thermal sensor unit comprises thermistor and divider resistance.
8, liquid crystal display module as claimed in claim 6 is characterized in that, described routine processes unit is a single-chip microcomputer.
9, liquid crystal display module as claimed in claim 6 is characterized in that, described AD conversion unit is the touch-screen control module that is integrated in the LCD controller; Described D/A conversion unit comprises PWM unit and the electric capacity that is integrated in the LCD.
10, liquid crystal display module as claimed in claim 6 is characterized in that, described feedback control circuit comprises two-stage calculation amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202349657U CN201327703Y (en) | 2008-12-12 | 2008-12-12 | Temperature compensating device and liquid crystal display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202349657U CN201327703Y (en) | 2008-12-12 | 2008-12-12 | Temperature compensating device and liquid crystal display module |
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| Publication Number | Publication Date |
|---|---|
| CN201327703Y true CN201327703Y (en) | 2009-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008202349657U Expired - Lifetime CN201327703Y (en) | 2008-12-12 | 2008-12-12 | Temperature compensating device and liquid crystal display module |
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| CN (1) | CN201327703Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062617A (en) * | 2010-12-15 | 2011-05-18 | 北京经纬恒润科技有限公司 | Method and device for generating reference quantity and measurement system |
| WO2015109801A1 (en) * | 2014-01-27 | 2015-07-30 | 京东方科技集团股份有限公司 | Gamma reference voltage generation device, and display |
| CN110989753A (en) * | 2019-11-25 | 2020-04-10 | 中国辐射防护研究院 | Adjustable high-resolution power output module suitable for SiPM |
-
2008
- 2008-12-12 CN CNU2008202349657U patent/CN201327703Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102062617A (en) * | 2010-12-15 | 2011-05-18 | 北京经纬恒润科技有限公司 | Method and device for generating reference quantity and measurement system |
| CN102062617B (en) * | 2010-12-15 | 2013-06-12 | 北京经纬恒润科技有限公司 | Method and device for generating reference quantity and measurement system |
| WO2015109801A1 (en) * | 2014-01-27 | 2015-07-30 | 京东方科技集团股份有限公司 | Gamma reference voltage generation device, and display |
| US9997097B2 (en) | 2014-01-27 | 2018-06-12 | Boe Technology Group Co., Ltd. | Gamma reference voltage generating device and display with temperature compensation |
| CN110989753A (en) * | 2019-11-25 | 2020-04-10 | 中国辐射防护研究院 | Adjustable high-resolution power output module suitable for SiPM |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091014 |