CN217113806U - Display screen with embedded temperature sensing function - Google Patents
Display screen with embedded temperature sensing function Download PDFInfo
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- CN217113806U CN217113806U CN202122659572.9U CN202122659572U CN217113806U CN 217113806 U CN217113806 U CN 217113806U CN 202122659572 U CN202122659572 U CN 202122659572U CN 217113806 U CN217113806 U CN 217113806U
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Abstract
The utility model discloses a display screen of embedded thalposis function, the display screen includes the LCD panel, the LCD panel is polaroid, CF base plate, TFT array substrate and polaroid down from last stacked structure extremely down, TFT array substrate comprises display area and non-display area, is equipped with the thalposis TFT that is used for detecting the temperature at non-display area. The utility model discloses a set up temperature sensing TFT on TFT array substrate to utilize temperature sensing TFT's temperature characteristic, introduce drive IC or convert into the temperature with temperature sensing TFT's leakage current and introduce drive IC after, make drive IC's output voltage remain stable, realize the regulation to display screen display effect, make display screen display effect and normal atmospheric temperature unanimous under low temperature or high temperature environment.
Description
Technical Field
The utility model belongs to the technical field of liquid crystal display, concretely relates to display screen of embedded thalposis function.
Background
At present, liquid crystal display screens in the market are all TFT screens, namely, a thin film transistor array technology is adopted. Based on the temperature characteristics of the TFT, the mobility of carriers in the TFT is decreased as the temperature increases, so that Vtft (source-drain voltage of the TFT) is decreased as the temperature increases, which causes different leakage currents in different temperature environments, and when the same voltage is applied externally, the leakage current is increased, which increases the standby power consumption, and also increases the liquid crystal driving voltage, which deteriorates the liquid crystal display effect and increases the power consumption.
On the contrary, as the temperature decreases, Vtft increases, which causes the driving voltage to decrease, the liquid crystal display effect to deteriorate, and the picture to become white or even to be turned off.
In order to solve the above problems, it is necessary to ensure the stability of the liquid crystal driving voltage, and therefore, the input voltage of the TFT needs to be adjusted, and further, the temperature of the display screen needs to be measured, and the input voltage of the TFT needs to be adjusted according to the temperature characteristic of the TFT and the current temperature, so as to ensure that the driving voltage output by the TFT remains stable, and ensure the display effect.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve provides a display screen of embedded temperature sensing function, can adjust drive IC's output through detecting the display screen temperature to guarantee that the drive voltage of TFT output remains stable, guarantee the display effect of display screen.
In order to solve the above problems, the utility model adopts the following technical proposal:
the utility model provides an embedded temperature sensing function's display screen, the display screen includes the LCD panel, the LCD panel is last polaroid, CF base plate, TFT array substrate and polaroid down from last stacked structure extremely down, the TFT array substrate comprises display area and non-display area, is equipped with the temperature sensing TFT that is used for detecting the temperature at non-display area.
Furthermore, the temperature-sensitive TFT and the display driving TFT in the display area of the TFT array substrate have the same structure and material, and are manufactured under the same process.
Preferably, the number of the temperature-sensitive TFTs is 2 or more.
Furthermore, the grid electrode, the source electrode and the drain electrode of the temperature-sensing TFT are respectively connected in parallel, namely the grid electrodes of all the temperature-sensing TFTs are connected in parallel, the source electrodes of all the temperature-sensing TFTs are connected in parallel, and the drain electrodes of all the temperature-sensing TFTs are connected in parallel.
Furthermore, the lower portion of the TFT array substrate is a single-layer area, the single-layer area is a portion of a non-display area, a driver IC and FPC binding pins are arranged in the single-layer area, and a grid electrode, a source electrode and a drain electrode of the temperature-sensitive TFT are respectively led to the FPC binding pins through wires.
Furthermore, the lower portion of the TFT array substrate is a single-layer area, the single-layer area is a portion of a non-display area, a driver IC and FPC binding pins are arranged in the single-layer area, and a grid electrode, a source electrode and a drain electrode of the temperature-sensing TFT are respectively led to input pins of the driver IC through wires.
Further, the driving IC incorporates a voltage regulation module, and a control signal of the voltage regulation module is derived from an external input signal, which is a leakage current signal of the temperature-sensitive TFT.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
the utility model discloses a set up temperature sensing TFT on TFT array substrate to utilize temperature sensing TFT's temperature characteristic, introduce drive IC with temperature sensing TFT's leakage current or introduce drive IC after converting into the temperature, make drive IC's output voltage remain stable, realize the regulation to display screen display effect, make display screen display effect and normal atmospheric temperature unanimous under low temperature or high temperature environment.
Drawings
FIG. 1 is a temperature-sensitive TFT parallel circuit diagram of the present invention;
fig. 2 is a flow chart for regulating and controlling the display screen of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model relates to a display screen with embedded temperature sensing function to and the regulation and control method of this display screen, the regulation and control method of this display screen is based on embedded temperature sensing function. The utility model discloses an embedded temperature sensing TFT that has the temperature measurement function in the display screen utilizes temperature sensing TFT's temperature characteristic (temperature and leakage current are the direct proportion relation), calculates the current temperature of display screen, utilizes temperature regulation and control drive IC's output voltage, and then controls the display effect of display screen.
Example 1
Right the utility model discloses, it the display screen includes the LCD panel at least, the basic structure of LCD panel is from last polaroid, CF base plate, TFT array substrate and the lower polaroid that piles up extremely down in proper order, wherein, TFT array substrate comprises display area and non-display area, is equipped with the temperature-sensing TFT that is used for detecting the temperature at non-display area.
As a preferred embodiment of the present invention, the temperature-sensitive TFT and the display driving TFT in the TFT array substrate display area have the same structure and material, and are manufactured under the same process.
Since the leakage of the temperature-sensitive TFTs is small, the number of the temperature-sensitive TFTs is 2 or more in order to facilitate measurement and ensure accuracy. As shown in fig. 1, the utility model discloses a n temperature-sensing TFT, temperature-sensing TFT's grid, source electrode and drain electrode connect in parallel together respectively, and all temperature-sensing TFT's grid connects in parallel promptly, and all temperature-sensing TFT's source electrode connects in parallel, and all temperature-sensing TFT's drain electrode connects in parallel, specifically refers to fig. 1.
As a preferred embodiment of the present invention, TFT array substrate's lower part is individual layer district, and individual layer district is non-display area's a part, sets up driver IC and FPC in individual layer district and binds the pin, temperature sensing TFT's grid, source electrode and drain electrode cause FPC to bind the pin through walking the line respectively. The temperature sensing TFT is connected with the temperature detection circuit through the FPC, the MCU calculates the current temperature, then the temperature data is sent to the drive IC through the FPC, the output voltage (the drive voltage of the TFT in the display area) is adjusted through the drive IC, the display effect of the display screen is further adjusted, and the output voltage of the drive IC is kept stable during adjustment.
Based on above-mentioned display screen structure, the utility model provides a regulation and control method of display screen of embedded temperature sensing function, regulation and control method utilizes the direct proportion relation of temperature sensing TFT leakage current and temperature, converts temperature into through calculating temperature with temperature sensing TFT's leakage current, and temperature input drive IC, and then regulation and control drive IC makes its output drive voltage remain stable. The flow chart of the display screen regulation and control method of the utility model is shown in figure 2.
The utility model discloses among the regulation and control method, temperature-sensing TFT leakage current is direct proportion relation with the temperature:
namely (Tt +273)/(T0+273) ═ (It/I0) ^ (2/3),
from this, the leakage current It can be calculated: it ═ ((Tt +273)/(T0+273)) (3/2) × I0,
the formula for converting the leakage current of the temperature-sensitive TFT into temperature through calculation is as follows: tt ═ I0 ^ (2/3) × (T0+273) -273, where I0 is the leakage current of the temperature-sensitive TFT at temperature T0 and It is the leakage current of the temperature-sensitive TFT at temperature Tt.
In a preferred embodiment of the present invention, I0 is the leakage current of n temperature-sensitive TFTs at a temperature T0, and It is the leakage current of n temperature-sensitive TFTs at a temperature Tt. Namely, the measured current is the leakage current of n temperature-sensitive TFTs connected in parallel, and n is a natural number greater than 1.
For the utility model discloses, MCU calculates behind the current temperature, can also judge the comparison, if the temperature surpasses normal use temperature, can send alarm information, and alarm information can be sound signal, can be display signal, can both have concurrently.
Example 2
The present embodiment is different from embodiment 1 in that: in this embodiment, the lower portion of the TFT array substrate is a single-layer region, the single-layer region is a portion of a non-display region, a driver IC and an FPC bonding pin are disposed in the single-layer region, and a gate, a source, and a drain of the temperature-sensitive TFT are respectively led to an input pin of the driver IC through wires.
The driving IC is internally provided with a voltage regulating module, and a control signal of the voltage regulating module is from an external input signal, namely a leakage current signal of the temperature-sensitive TFT. A leakage current signal of the temperature-sensing TFT directly enters the drive IC, and the leakage current is converted into voltage by a voltage regulation module arranged in the drive IC and used as a regulation signal of the voltage regulation module to participate in the regulation work of the voltage regulation module, so that the drive IC is regulated and controlled to keep the output drive voltage stable, and the display effect of the display screen is regulated.
The method for regulating and controlling the display screen structure is different from the method in embodiment 1, in the method for regulating and controlling the display screen structure, the leakage current of the temperature-sensitive TFT is directly input into the driving IC by utilizing the direct proportional relation between the leakage current and the temperature of the temperature-sensitive TFT, and then the driving IC is regulated and controlled to enable the output driving voltage of the driving IC to be stable.
According to the control method, the leakage current directly enters the drive IC, so that circuits and conversion are reduced, and the efficiency is better.
For the utility model discloses, MCU calculates after the current temperature, can convert it to voltage signal, input driver IC, rather than input temperature signal, voltage signal gets into driver IC's voltage control module, participates in driver IC output voltage's control.
Claims (7)
1. The utility model provides an embedded temperature sensing function's display screen, the display screen includes the LCD panel, the LCD panel is last polaroid, CF base plate, TFT array substrate and polaroid down from last stacked structure extremely down, the TFT array substrate comprises display area and non-display area, its characterized in that: a temperature-sensitive TFT for detecting temperature is provided in the non-display region.
2. The display screen with the embedded temperature sensing function according to claim 1, wherein: the temperature-sensitive TFT and the display driving TFT in the display area of the TFT array substrate have the same structure and material, and are manufactured under the same process.
3. The display screen with the embedded temperature sensing function according to claim 2, wherein: the number of the temperature-sensitive TFTs is more than 2.
4. The display screen with the embedded temperature sensing function according to claim 3, wherein: the grid electrode, the source electrode and the drain electrode of the temperature-sensing TFT are respectively connected in parallel, namely the grid electrodes of all the temperature-sensing TFTs are connected in parallel, the source electrodes of all the temperature-sensing TFTs are connected in parallel, and the drain electrodes of all the temperature-sensing TFTs are connected in parallel.
5. The display screen with the embedded temperature sensing function according to claim 4, wherein: the lower portion of the TFT array substrate is a single-layer area, the single-layer area is a portion of a non-display area, a driving IC and FPC binding pins are arranged in the single-layer area, and a grid electrode, a source electrode and a drain electrode of the temperature sensing TFT are led to the FPC binding pins through wiring respectively.
6. The display screen with the embedded temperature sensing function according to claim 1, wherein: the lower portion of the TFT array substrate is a single-layer area, the single-layer area is not part of a display area, a drive IC and an FPC binding pin are arranged in the single-layer area, and a grid electrode, a source electrode and a drain electrode of the temperature-sensing TFT are respectively led to an input pin of the drive IC through wiring.
7. The display screen with embedded temperature sensing function according to claim 5 or 6, wherein: the driving IC is internally provided with a voltage regulating module, a control signal of the voltage regulating module is from an external input signal, and the external input signal is a leakage current signal of the temperature-sensitive TFT.
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| CN202122659572.9U CN217113806U (en) | 2021-11-02 | 2021-11-02 | Display screen with embedded temperature sensing function |
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| CN202122659572.9U CN217113806U (en) | 2021-11-02 | 2021-11-02 | Display screen with embedded temperature sensing function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117116225A (en) * | 2023-09-21 | 2023-11-24 | 东莞市峰沃光电有限公司 | TFT-LCD liquid crystal display and driving method thereof |
| CN117116225B (en) * | 2023-09-21 | 2024-05-14 | 东莞市峰沃光电有限公司 | TFT-LCD liquid crystal display and driving method thereof |
-
2021
- 2021-11-02 CN CN202122659572.9U patent/CN217113806U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117116225A (en) * | 2023-09-21 | 2023-11-24 | 东莞市峰沃光电有限公司 | TFT-LCD liquid crystal display and driving method thereof |
| CN117116225B (en) * | 2023-09-21 | 2024-05-14 | 东莞市峰沃光电有限公司 | TFT-LCD liquid crystal display and driving method thereof |
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