CN110596983A - Display device - Google Patents
Display device Download PDFInfo
- Publication number
- CN110596983A CN110596983A CN201810511618.2A CN201810511618A CN110596983A CN 110596983 A CN110596983 A CN 110596983A CN 201810511618 A CN201810511618 A CN 201810511618A CN 110596983 A CN110596983 A CN 110596983A
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- Prior art keywords
- display
- processor
- display device
- signals
- detection
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
Abstract
The invention discloses a display device which comprises a processor and a display panel. The processor is used for outputting a plurality of display signals. The display panel comprises a plurality of display units and a plurality of temperature sensors, wherein the display units are electrically connected with the processor and used for receiving display signals so as to provide a display picture. The temperature sensor is also electrically connected to the processor for detecting the temperature of different areas in the display panel and transmitting the detection signal to the processor according to the temperature, so that the processor adjusts at least one display signal. The quality of the display picture can be more accurately controlled by detecting the temperatures of different areas in real time.
Description
Technical Field
The present invention relates to a display device, and more particularly, to a display device capable of detecting temperature in real time.
Background
When equipment such as a smart phone, a smart wearable device, and a large-size display signboard is in operation, the display devices on the equipment generate temperature changes. Taking electronic paper as an example, the display principle of electronic paper is that an electric field is generated to an electrophoretic fluid through electrodes, so that charged particles with different colors can move in the electrophoretic fluid, and a display picture is generated. Since the moving speed of the charged particles is closely related to the temperature of the electrophoretic fluid, if the display device does not adjust the internal parameters in real time with the temperature change, the display screen is likely to generate ghost images or various defects. Similarly, other types of display devices (e.g., liquid crystal) have the same problems.
Disclosure of Invention
The invention aims to provide a display device which can more accurately control the quality of a display picture by detecting the temperature of different areas in real time.
One aspect of the present invention relates to a display device. The display device comprises a processor and a display panel. The processor is used for outputting a plurality of display signals. The display panel comprises a plurality of display units and a plurality of temperature sensors. The display units are electrically connected to the processor and used for receiving the display signals to provide a display picture. The temperature sensors are electrically connected to the processor and are respectively used for detecting the temperatures of different areas in the display panel and transmitting a plurality of detection signals to the processor, so that the processor adjusts at least one of the display signals according to at least one of the detection signals.
In an embodiment of the invention, the display panel includes a plurality of display regions. Each display area comprises at least one display unit, the temperature sensors are respectively arranged at corresponding positions corresponding to the display areas in the display panel, and when any one of the detection signals exceeds a threshold value, the processor is used for adjusting the display signals corresponding to the display units in the corresponding display area according to the detection signals.
In an embodiment of the invention, the display panel includes a substrate, an ink layer and a protective layer. The display units and the temperature sensors are arranged on the substrate, and each display unit comprises a pixel electrode. The ink layer comprises a display medium, the substrate is arranged on the first side surface of the ink layer, and the protective layer is arranged on the second side surface of the ink layer.
In an embodiment of the invention, the temperature sensors are disposed on a side of the substrate corresponding to the ink layer.
In an embodiment of the invention, the display signals are used for driving the display units, and the processor is used for adjusting the time for generating the electric field by the display units according to the detection signals.
In an embodiment of the invention, the display medium includes an electrophoretic fluid, a plurality of colored charged particles and a plurality of white charged particles, and the colored charged particles and the white charged particles are distributed in the electrophoretic fluid.
In an embodiment of the invention, the temperature sensors are used for detecting a detection current in the display panel and generating a detection signal accordingly.
In an embodiment of the invention, the processor includes a conversion unit for converting the detection current from an analog form to a digital form.
In an embodiment of the invention, the processor includes a compensation unit for calculating compensation data according to the detection signal and adjusting the display signal according to the compensation data.
In an embodiment of the invention, the processor is configured to periodically output the display signals to the display units during the frame updating period to update the display frame, and receive the detection signals output by the temperature sensors during idle periods between adjacent frame updating periods.
In an embodiment of the present invention, the temperature sensor is a current sensing resistor, a thermal sensing resistor or a switching transistor.
Compared with the prior art, the display device has the beneficial effect that the quality of the display picture can be more accurately controlled by detecting the temperatures of different areas in real time.
Drawings
Fig. 1 is a schematic diagram of a display device according to some embodiments of the invention.
Fig. 2 is a schematic diagram of a display panel according to a part of the embodiment of the invention.
Fig. 3 is a schematic diagram of a display panel according to a part of the embodiment of the invention.
Fig. 4 is a schematic diagram of a temperature sensor according to some embodiments of the invention.
Fig. 5 is a schematic diagram of a display panel according to a portion of the embodiment of the invention.
Detailed Description
In the following description, numerous implementation details are set forth in order to provide a thorough understanding of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simple schematic manner.
When an element is referred to as being "connected" or "coupled" herein, it can be referred to as being "electrically connected" or "electrically coupled". "connected" or "coupled" may also be used to indicate that two or more elements are in mutual engagement or interaction. Moreover, although terms such as "first," "second," …, etc., may be used herein to describe various elements, these terms are used merely to distinguish one element or operation from another element or operation described in similar technical terms. Unless the context clearly dictates otherwise, the terms do not specifically refer or imply an order or sequence nor are they intended to limit the invention.
Please refer to fig. 1 and fig. 2. Fig. 1 and 2 are schematic diagrams of a display device 100 according to some embodiments of the invention. As shown in fig. 1, the display device 100 includes a processor 110 and a display panel 120, wherein the processor 110 is configured to generate a plurality of display signals. In some embodiments, the processor 110 includes a conversion unit 111 and a compensation unit 112. In some embodiments, the display signal may be, but is not limited to, a driving voltage/current for controlling the liquid crystal display or a driving voltage/current for controlling the electrodes in the electronic paper.
Structurally, the processor 110 is electrically connected to the display panel 120. As shown in fig. 1, in some embodiments, the display panel 120 includes a plurality of display units 121 and a plurality of temperature sensors 122. Structurally, the display unit 121 is electrically connected to the processor 110 for receiving the display signal transmitted from the processor 110 to provide the display frame 20 shown in fig. 2.
Please refer to fig. 2. In some embodiments, as shown in fig. 2, the display screen 20 of the display panel 120 includes a plurality of display areas 21, and the temperature sensors 122 are respectively located at positions corresponding to different display areas 21 in the display panel 120. In other words, each display area 21 has at least one temperature sensor 122.
Please refer to fig. 1 again. In some embodiments, each display unit 121 is used for displaying an image of each pixel according to a display signal, such as a pixel electrode and an electronic ink in a liquid crystal cell or an electronic paper. In some embodiments, each display unit 121 includes a pixel electrode, and the display panel 120 further includes a plurality of data lines 121a and a plurality of scan lines 121b, and the pixel electrodes receive display signals from the processor 110 through the data lines 121a and the scan lines 121b to display corresponding brightness or color.
The temperature sensor 122 is electrically connected to the processor 110 for detecting the temperature of different areas (e.g., each display area 21) of the display panel 120, and the temperature sensor 122 transmits a plurality of detection signals to the processor 110 according to the detection result, so that the processor 110 can adjust the magnitude or frequency of at least one display signal according to the at least one detection signal to ensure that the image displayed by the display device 100 is not distorted due to the temperature of the display unit 121. Since the temperature sensor 122 is disposed inside the display panel 120, not outside the display panel 120, the actual temperature of the display panel 120 can be accurately detected. In addition, a plurality of temperature sensors 122 are disposed in the display panel 120, so that the actual temperature of each local area can be reflected, and the processor 110 can precisely adjust the display signal.
In some embodiments, the temperature sensors 122 periodically detect the detection signals, and the processor 110 receives the detection signals from the temperature sensors 122, determines the display area 21 corresponding to each detection signal, adjusts the display signal corresponding to the display area 21 according to the detection signals, and finally transmits the adjusted display signal to the display units 121 located in the corresponding display areas 123. Please refer to fig. 3. Fig. 3 is a partial cross-sectional view of the display panel 120. As shown in fig. 3, in some embodiments, the display panel 120 further includes a substrate 31, an ink layer 32 and a protection layer 33, and the display unit 121 and the temperature sensor 122 are respectively disposed on one side of the substrate 31 corresponding to the ink layer 32. The ink layer 32 includes a display medium 320, and the substrate 31 is disposed on a first side (e.g., a bottom side) of the ink layer 32, and the protection layer 33 is disposed on a second side (e.g., a top side) of the ink layer 32. In some embodiments, the display medium 320 includes an electrophoretic liquid 321, a plurality of charged color particles (e.g., charged black particles) 322, and a plurality of charged white particles 323, wherein the charged white particles 323 and the charged color particles 322 are distributed in the electrophoretic liquid 321, and the charged white particles 323 and the charged color particles 322 can move toward the display unit 121 or away from the display unit 121 according to an electric field generated by the display unit 121. Accordingly, the display unit 121 can display an image of each pixel by controlling the movement of the white charged particles 323 and the color charged particles 322 according to the display signal.
As shown in fig. 3, in some embodiments, the temperature sensor 122 may be fabricated and integrated on the substrate 31 when the display panel 120 is fabricated. For example, the temperature sensor 122 may be formed on the substrate 31 together with the scan line 121 b. The temperature sensor 122 may be disposed on the substrate 31 at a position between the scan lines 121b or the display units 121, and is configured to detect a detection voltage or a detection current in the display panel 120, so as to generate a detection signal.
In some embodiments, the temperature sensor 122 may be a current sensing resistor or a thermal sensing resistor, but the disclosure is not limited thereto. Please refer to fig. 4. As shown in fig. 4, in some other embodiments, the temperature sensor 122 may be used to detect a potential difference between two input terminals Vb1 and Vb2 in the display panel 120, and the input terminals Vb1 and Vb2 may be electrically connected to the data line 121a and the scan line 121b shown in fig. 1, respectively. The temperature sensor 122 is provided with a plurality of resistors R1, R2, Rptat and switching elements Q1 to Q3, so that the detection current Iptat is detected based on the potential difference between the input terminals Vb1 and Vb 2. As shown in fig. 4, structurally, the resistor R1 is connected in series with the switching element Q2, the resistor R2 is connected in series with the switching element Q3, and the resistor R1, the switching element Q2, the resistor Rptat, the resistor R2 and the switching element Q3 form a series branch, respectively. In some other embodiments, the temperature sensor 122 is used for detecting a detection potential difference between the reference point Vref and the detection point Vptat. The detection signal may be a detection current Iptat or a detection potential difference between the reference points Vref and Vptat, which is used to reflect the current temperature of the display area 21.
Referring to fig. 5, in some embodiments, the temperature sensor 122 may be a switching transistor for detecting a detection voltage or a detection current in the display panel 120. The switching transistor serving as the temperature sensor 122 may be fabricated on the substrate 31 together with other switching transistors for driving the pixel electrodes in the display unit 121 during the fabrication of the display panel 120, so as to simplify the fabrication process.
Referring to fig. 1 to 4, in some embodiments, after the temperature sensor 122 detects the magnitude of the detection current Iptat, the detection signal is transmitted to the processor 110, so that the processor 110 can determine the temperature value. In some embodiments, the converting unit 111 in the processor 110 is configured to convert the current value of the detection current Iptat from an analog form to a digital form, so that the processor 110 accurately calculates the temperature value corresponding to the detection signal.
In some embodiments, if the processor 110 determines that any of the detection signals exceeds the threshold, the processor 110 is configured to adjust the display signals corresponding to the display units 121 in the display area 21 according to the detection signal. In some embodiments, the processor 110 is configured to determine whether the detection current Iptat or the detection potential difference exceeds a threshold value, and in other embodiments, the processor 110 may also be configured to determine whether the temperature corresponding to the detection current Iptat exceeds the threshold value. For example, the threshold may be a fixed value (e.g., 25 degrees Celsius, 1500 milliamperes) or a range (e.g., 23 degrees Celsius to 25 degrees Celsius, 1200 to 1500 milliamperes).
In some embodiments, the display signal is used to drive the display unit 121 to generate an electric field in the display medium 320, and the processor 110 adjusts the time for the display unit 121 to generate the electric field to the display medium 320 according to the detection signal. For example, since the moving speed of the white charged particles 323 and the colored (e.g., black) charged particles 322 in the electrophoretic liquid 321 is proportional to the temperature, when the processor 110 determines that the temperature of the display area 21 is higher than the threshold value according to the detection signal, the driving time for driving the display unit 121 can be reduced, thereby avoiding the problem of color distortion of the pixels displayed by the display unit 121. Similarly, when the processor 110 determines that the temperature of the display area 21 is lower than the threshold value according to the detection signal, the driving time for driving the display unit 121 may be increased.
In some embodiments, the compensation unit 112 in the processor 110 is configured to calculate compensation data according to the detection signal, so that the processor 110 adjusts the display signal according to the compensation data. In some other embodiments, the compensation unit 112 has a compensation formula or stores a compensation database, so as to calculate the adjustment amplitude required by the display signal according to the detection signal, or find the adjustment value corresponding to the detection signal according to the compensation database. For example: if the processor 110 determines that the temperature of the display area 21 is 35 degrees celsius and the display area 21 should display the color of "gray scale value 95", the processor 110 may find the driving time or the driving voltage value required for the display unit 121 to display "gray scale value 95" at 35 degrees celsius from the compensation database.
In some embodiments, the processor 110 is configured to periodically output a display signal to the display unit 121 during a frame update period to update the display frame 20, and the adjacent frame update periods have idle periods. The processor 110 receives the detection signal output by the temperature sensor 122 during the idle period. For example: the processor 110 sends a display signal to the display unit 121 via the data line 121a and the scan line 121b every 20 milliseconds (millisecond) to update the display screen 20. The temperature sensor 122 can send the detection signal to the processor 110 during the idle period of 20 ms, so that the processor 110 can determine whether the detection signal matches the threshold value, and adjust the display signal accordingly.
In summary, through the operations of the embodiments of the present invention, the processor 110 can determine the temperatures of the different display areas 21 on the display screen 20 displayed on the display panel 120 according to the detection signals transmitted from the temperature sensor 122, so that the processor 110 can adjust the corresponding display signals for each display area 21 in real time according to the temperature changes to compensate. Accordingly, the display screen 20 can be prevented from generating ghost images, uneven brightness or various defects. In addition, since the temperature sensor 122 is directly fabricated on the substrate 31 of the display panel 120, the detection signal detected by the temperature sensor 122 can truly reflect the temperature of each display region, thereby improving the compensation accuracy.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (11)
1. A display device, comprising:
a processor for outputting a plurality of display signals; and
a display panel, comprising:
the display units are electrically connected with the processor and used for receiving the display signals to provide a display picture; and
the temperature sensors are respectively used for detecting the temperatures of different areas in the display panel and transmitting a plurality of detection signals to the processor, so that the processor adjusts at least one of the display signals according to at least one of the detection signals.
2. The display device according to claim 1, wherein the display panel comprises a plurality of display areas, each display area comprises at least one of the display units, the plurality of temperature sensors are respectively disposed at corresponding positions corresponding to the plurality of display areas in the display panel, and the processor is configured to adjust the plurality of display signals corresponding to the plurality of display units in the corresponding display area according to the detection signal when any one of the plurality of detection signals exceeds a threshold value.
3. The display device according to claim 1, wherein the display panel comprises:
a substrate on which the plurality of display units and the plurality of temperature sensors are disposed, wherein each of the plurality of display units includes a pixel electrode;
the ink layer comprises a display medium, and the substrate is arranged on the first side surface of the ink layer; and
and the protective layer is arranged on the second side surface of the ink layer.
4. The display device according to claim 3, wherein the plurality of temperature sensors are disposed on one side of the substrate corresponding to the ink layer.
5. The display device as claimed in claim 3, wherein the display signals are used for driving the display units, and the processor is used for adjusting the time for generating the electric field by the display units according to the detection signals.
6. The display device according to claim 5, wherein the display medium comprises an electrophoretic fluid, a plurality of colored charged particles and a plurality of white charged particles, and the plurality of colored charged particles and the plurality of white charged particles are distributed in the electrophoretic fluid.
7. The display device as claimed in claim 1, wherein the plurality of temperature sensors are configured to detect a detection current in the display panel and generate the detection signal accordingly.
8. The display device of claim 7, wherein the processor comprises a conversion unit for converting the detected current from analog to digital form.
9. The display device of claim 1, wherein the processor comprises a compensation unit configured to calculate compensation data according to the detection signal and adjust the display signal according to the compensation data.
10. The display device as claimed in claim 1, wherein the processor is configured to output the display signals to the display units to update the display frames during frame update periods periodically, and receive the detection signals output by the temperature sensors during idle periods between adjacent frame update periods.
11. The display device according to claim 1, wherein the temperature sensor is a current-sensing resistor, a thermal-sensing resistor, or a switching transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810511618.2A CN110596983B (en) | 2018-05-25 | 2018-05-25 | Display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810511618.2A CN110596983B (en) | 2018-05-25 | 2018-05-25 | Display device |
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| Publication Number | Publication Date |
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| CN110596983A true CN110596983A (en) | 2019-12-20 |
| CN110596983B CN110596983B (en) | 2023-01-17 |
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| CN201810511618.2A Active CN110596983B (en) | 2018-05-25 | 2018-05-25 | Display device |
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| CN110596983B (en) | 2023-01-17 |
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