CN215495967U - Segment code type double-screen LCD display circuit - Google Patents
Segment code type double-screen LCD display circuit Download PDFInfo
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- CN215495967U CN215495967U CN202120976109.4U CN202120976109U CN215495967U CN 215495967 U CN215495967 U CN 215495967U CN 202120976109 U CN202120976109 U CN 202120976109U CN 215495967 U CN215495967 U CN 215495967U
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Abstract
The utility model provides a segment code type double-screen LCD display circuit, comprising: the MCU is connected with the first display driving chip through the first switch circuit and is connected with the second display driving chip through the second switch circuit; the first display driving chip and the second display driving chip are respectively connected with a first segment code type LCD screen and a second segment code type LCD screen which are stacked up and down; and the first display driving chip and the second display driving chip are respectively connected with the connecting ports of the switch circuit through the first discharging resistor and the second discharging resistor to be grounded. In order to solve the problem of residual images displayed by a laminated segment code type LCD screen, a double-display driving structure is adopted, and a discharge resistor is introduced, so that double-screen alternate display is not influenced mutually, and the optimal display effect is achieved or approached.
Description
Technical Field
The utility model relates to the field of display control circuits, in particular to a segment code type double-screen LCD display circuit.
Background
The segment code type LCD liquid crystal screen with double-layer overlapped arrangement can realize richer display effect and content in a limited area, but because of a conventional display driving means (a common display driving module), at a certain moment, the LCD screen which is not displayed still has display residue when the screen is turned off, so that the interference on the normally displayed LCD screen is caused, and the display effect is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a segment code type double-screen LCD display circuit aiming at overcoming the defects and shortcomings in the prior art and aiming at solving the problem of display effect of a laminated segment code type LCD screen.
The technical scheme is as follows:
a segment code type double-screen LCD display circuit is characterized in that: the MCU is connected with the first display driving chip through the first switch circuit and is connected with the second display driving chip through the second switch circuit; the first display driving chip and the second display driving chip are respectively connected with a first segment code type LCD screen and a second segment code type LCD screen which are stacked up and down; and the first display driving chip and the second display driving chip are respectively connected with the connecting ports of the switch circuit through the first discharging resistor and the second discharging resistor to be grounded.
Further, the MCU is connected with a gravity sensor.
Further, the first switch circuit and the second switch circuit adopt a triode or an MOS tube as a switch element.
Further, the model number adopted by the MCU is TM 8725; the first display driving chip and the second display driving chip are ET7008 in model.
The utility model and the optimized proposal thereof adopt a double-display driving structure and introduce a discharge resistor to realize that the double-screen alternate display does not influence each other so as to achieve or approach the best display effect in order to solve the problem of residual images displayed by the laminated segment code type LCD screen.
Drawings
The utility model is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic diagram of a display driver circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the MCU circuit according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of a rotation control circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a reset circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a key circuit according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a memory circuit according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a backlight circuit according to an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a voltage regulator circuit according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a temperature circuit according to an embodiment of the present invention.
Detailed Description
In order to make the features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail as follows:
as shown in fig. 1 and fig. 2, in order to solve the problem of image sticking in the display of the stacked segment code LCD, the present embodiment adopts a dual-display driving structure and introduces a discharge resistor. The design key points are as follows:
the MCU is connected with the first display driving chip through the first switch circuit and is connected with the second display driving chip through the second switch circuit; the first display driving chip and the second display driving chip are respectively connected with a first section of code type LCD screen and a second section of code type LCD screen which are stacked up and down; the first display driving chip and the second display driving chip are connected with the switch circuit through the first discharging resistor and the second discharging resistor respectively. The first switch circuit and the second switch circuit adopt triodes as switch elements (MOS tubes can be replaced to realize the same effect).
When the MCU needs to control the first code type LCD screen to be on, a high level is given out on the POWER _ LCD1, and the PNP triode Q2 is conducted to supply POWER to the first ET 7008; when the second code type LCD screen needs to be switched to be on, the output of the POWER _ LCD1 is stopped, a high level is given out at a POWER _ LCD2, and at the moment, the PSB port of the first ET7008 empties the residual capacity through a resistor R3 so as to quickly eliminate the residual shadow, so that the display of the second code type LCD screen is interfered. Otherwise, the same principle is applied.
Based on the above design concept, the present embodiment thus designs a clock with a dual-screen display, as shown in fig. 3 to 9.
As shown in fig. 3, it realizes the rotation switching of the dual screens through the gravity sensor connected with the MCU: displaying the content of the first screen under the condition of a horizontal screen, and displaying the content of the second screen under the condition of a vertical screen; the first screen displays conventional information of a clock such as time, and the second screen can be used for displaying information such as room temperature, so that people can use the clock conveniently.
As shown in fig. 4 to fig. 9, the present embodiment also discloses that the above complete scheme is implemented: the specific circuit design of the reset circuit, the key circuit, the storage circuit, the backlight circuit, the voltage stabilizing circuit and the temperature circuit. Since these functional modules are basically of the conventional design and are basically unrelated to the utility model of the present embodiment, they are not described herein in detail.
The present invention is not limited to the above preferred embodiments, and various other types of segment code type dual-screen LCD display circuits can be obtained by anyone skilled in the art according to the teaching of the present invention.
Claims (4)
1. A segment code type double-screen LCD display circuit is characterized in that: the MCU is connected with the first display driving chip through the first switch circuit and is connected with the second display driving chip through the second switch circuit; the first display driving chip and the second display driving chip are respectively connected with a first segment code type LCD screen and a second segment code type LCD screen which are stacked up and down; and the first display driving chip and the second display driving chip are respectively connected with the connecting ports of the switch circuit through the first discharging resistor and the second discharging resistor to be grounded.
2. The segment code type dual-screen LCD display circuit of claim 1, wherein: the MCU is connected with a gravity sensor.
3. The segment code type dual-screen LCD display circuit of claim 1, wherein: the first switch circuit and the second switch circuit adopt triodes or MOS tubes as switch elements.
4. The segment code type dual-screen LCD display circuit of claim 1, wherein: the model number adopted by the MCU is TM 8725; the first display driving chip and the second display driving chip are ET7008 in model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120976109.4U CN215495967U (en) | 2021-05-10 | 2021-05-10 | Segment code type double-screen LCD display circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120976109.4U CN215495967U (en) | 2021-05-10 | 2021-05-10 | Segment code type double-screen LCD display circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215495967U true CN215495967U (en) | 2022-01-11 |
Family
ID=79777304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120976109.4U Active CN215495967U (en) | 2021-05-10 | 2021-05-10 | Segment code type double-screen LCD display circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215495967U (en) |
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2021
- 2021-05-10 CN CN202120976109.4U patent/CN215495967U/en active Active
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