CN206471105U - A kind of LCD drives display circuit - Google Patents
A kind of LCD drives display circuit Download PDFInfo
- Publication number
- CN206471105U CN206471105U CN201621371129.4U CN201621371129U CN206471105U CN 206471105 U CN206471105 U CN 206471105U CN 201621371129 U CN201621371129 U CN 201621371129U CN 206471105 U CN206471105 U CN 206471105U
- Authority
- CN
- China
- Prior art keywords
- bias resistance
- copolar
- bias
- resistance
- lcd101
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Liquid Crystal Display Device Control (AREA)
Abstract
Display circuit, including single-chip microcomputer are driven the utility model discloses a kind of LCD, the single-chip microcomputer is connected by I/O ports with LCD101；LCD101 copolar COM1 COM4 are connected with the bias resistance R101 R108 connected two-by-two respectively, the bias resistance R101 and bias resistance R105, bias resistance R102 and bias resistance R106, bias resistance R103 and bias resistance R107, bias resistance R104 and bias resistance R108 are connected in parallel to each other, and in parallel one section is connected with the positive pole of power supply, other end ground connection in parallel.
Description
Technical field
The utility model is related to LCD circuit fields, specifically, is related specifically to a kind of LCD drivings display circuit.
Background technology
LCD principle is to coat a chemical substance in the middle of two blocks of clear glasses, needed for being carved respectively on two sheet glass
Pattern electrode (section pole and copolar), be then injected into liquid crystal.
When be not powered between two-plate pressure, liquid crystal molecule present it is regularly arranged, for light sensing without scattering process, panel is in
It is now transparent not show.When plus voltage, the ion in liquid crystal is collided under electric field action with liquid crystal molecule, produces molecule inclined
Move and irregular alignment situation is presented, produce scattering process for external light, transparent liquid crystal becomes milky, so applying
The field of power-up pole is revealed.
Because DC electric field will cause liquid crystal material to chemically react, cause ageing of electrode, and reduce liquid crystal material
Life-span, therefore must be driven with exchange.And require that the DC component of AC field (extreme pressure is poor together for section pole) is as small as possible, generally
It is required that DC component is less than 50mV.When AC field virtual value is more than liquid crystal voltage threshold values, pixel produces photoelectric effect, manifests
Show state；During less than threshold voltage, do not show；When virtual value is near threshold, the contrast of liquid crystal device will be influenceed.
Existing LCD is driven, cost is relatively higher, and cause the wasting of resources when showing that hop count is few using special chip.
Now usually using I/O mouthfuls of drivings.(pressure difference is generally set to be when the pressure difference between section pole SEG and copolar COM is more than display threshold values
VCC), corresponding section is shown.Because a copolar COM will control multiple sections of pole SEG, therefore COM must have individual medium voltage, make
Certain moment, the SEG of control was all off.
Utility model content
The purpose of this utility model is for of the prior art not enough there is provided a kind of LCD driving display circuits, to solve
Certainly above-mentioned problem.
The technical problem that the utility model is solved can be realized using following technical scheme：
A kind of LCD drives display circuit, including single-chip microcomputer, and the single-chip microcomputer is connected by I/O ports with LCD101；
The copolar COM1 of the LCD101 with connect bias resistance R101 be connected with bias resistance R105, copolar COM1 and
The bias resistance R101 and bias resistance R105 of series connection tie point are located between bias resistance R101 and bias resistance R105；
The copolar COM2 of the LCD101 with connect bias resistance R102 be connected with bias resistance R106, copolar COM2 and
The bias resistance R102 and bias resistance R106 of series connection tie point are located between bias resistance R102 and bias resistance R106；
The copolar COM3 of the LCD101 with connect bias resistance R103 be connected with bias resistance R107, copolar COM3 and
The bias resistance R103 and bias resistance R107 of series connection tie point are located between bias resistance R103 and bias resistance R107；
The copolar COM4 of the LCD101 with connect bias resistance R104 be connected with bias resistance R108, copolar COM4 and
The bias resistance R104 and bias resistance R108 of series connection tie point are located between bias resistance R104 and bias resistance R108；
The bias resistance R101 and bias resistance R105, bias resistance R102 and bias resistance R106, bias resistance
R103 and bias resistance R107, bias resistance R104 and bias resistance R108 are connected in parallel to each other, and one section in parallel with power supply just
Pole is connected, other end ground connection in parallel.
Compared with prior art, the beneficial effects of the utility model are as follows：
Medium voltage is obtained by using bias method, the section pole SEG for realizing a certain moment copolar COM controls is all off.
Brief description of the drawings
Fig. 1 is the schematic diagram that LCD described in the utility model drives display circuit.
Embodiment
To be easy to understand technological means, creation characteristic, reached purpose and effect of the utility model realization, below
With reference to embodiment, the utility model is expanded on further.
Referring to Fig. 1, a kind of LCD described in the utility model drives display circuit, including single-chip microcomputer, and the single-chip microcomputer passes through
I/O ports are connected with LCD101；
The copolar COM1 of the LCD101 with connect bias resistance R101 be connected with bias resistance R105, copolar COM1 and
The bias resistance R101 and bias resistance R105 of series connection tie point are located between bias resistance R101 and bias resistance R105；
The copolar COM2 of the LCD101 with connect bias resistance R102 be connected with bias resistance R106, copolar COM2 and
The bias resistance R102 and bias resistance R106 of series connection tie point are located between bias resistance R102 and bias resistance R106；
The copolar COM3 of the LCD101 with connect bias resistance R103 be connected with bias resistance R107, copolar COM3 and
The bias resistance R103 and bias resistance R107 of series connection tie point are located between bias resistance R103 and bias resistance R107；
The copolar COM4 of the LCD101 with connect bias resistance R104 be connected with bias resistance R108, copolar COM4 and
The bias resistance R104 and bias resistance R108 of series connection tie point are located between bias resistance R104 and bias resistance R108；
The bias resistance R101 and bias resistance R105, bias resistance R102 and bias resistance R106, bias resistance
R103 and bias resistance R107, bias resistance R104 and bias resistance R108 are connected in parallel to each other, and one section in parallel with power supply just
Pole is connected, other end ground connection in parallel.
The utility model uses the bias method with 1/2 bias to obtain medium voltage so that a certain moment copolar COM controls
Section pole SEG it is all off, bias resistance often select resistance be 47K, 51K, 100K.
General principle of the present utility model and principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the utility model spirit and scope are not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within the range of claimed the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (1)
1. a kind of LCD drives display circuit, it is characterised in that：Including single-chip microcomputer, the single-chip microcomputer passes through I/O ports and LCD101
Connection；
The copolar COM1 of the LCD101 is connected with the bias resistance R101 connected with bias resistance R105, and copolar COM1 is with connecting
Bias resistance R101 and bias resistance R105 tie point be located between bias resistance R101 and bias resistance R105；
The copolar COM2 of the LCD101 is connected with the bias resistance R102 connected with bias resistance R106, and copolar COM2 is with connecting
Bias resistance R102 and bias resistance R106 tie point be located between bias resistance R102 and bias resistance R106；
The copolar COM3 of the LCD101 is connected with the bias resistance R103 connected with bias resistance R107, and copolar COM3 is with connecting
Bias resistance R103 and bias resistance R107 tie point be located between bias resistance R103 and bias resistance R107；
The copolar COM4 of the LCD101 is connected with the bias resistance R104 connected with bias resistance R108, and copolar COM4 is with connecting
Bias resistance R104 and bias resistance R108 tie point be located between bias resistance R104 and bias resistance R108；
The bias resistance R101 and bias resistance R105, bias resistance R102 and bias resistance R106, bias resistance R103 and
Bias resistance R107, bias resistance R104 and bias resistance R108 are connected in parallel to each other, and one section in parallel is connected with the positive pole of power supply,
Other end ground connection in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621371129.4U CN206471105U (en) | 2016-12-14 | 2016-12-14 | A kind of LCD drives display circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621371129.4U CN206471105U (en) | 2016-12-14 | 2016-12-14 | A kind of LCD drives display circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206471105U true CN206471105U (en) | 2017-09-05 |
Family
ID=59712446
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621371129.4U Expired - Fee Related CN206471105U (en) | 2016-12-14 | 2016-12-14 | A kind of LCD drives display circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206471105U (en) |
-
2016
- 2016-12-14 CN CN201621371129.4U patent/CN206471105U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170905 Termination date: 20191214 |