TWI781442B - Display device and display method - Google Patents

Abstract

A display device includes a display, a memory, at least one sensor and a processor. The display is configured to display image. The memory is configured to store a loop-up table. The at least one sensor is configured to provide at least one auxiliary information. The processor is coupled to the display, the memory, and the at least one sensor, and is configured to receive a corresponding temperature information according to the loop-up table and the at least one auxiliary information, and is configured to adjust the display according to the temperature information.

Description

Display device and display method

This case relates to a display device and a display method.

In the prior art, the display device will perform settings such as gamma curve and chromaticity unevenness compensation before leaving the factory, so as to optimize the picture quality of the image displayed by the display device. However, parameters such as the gamma curve, brightness, color temperature, and contrast of the image will change with temperature changes. If only one-time adjustments are made before leaving the factory, corresponding settings cannot be adjusted in response to temperature changes.

In addition, the existing technology also configures a temperature sensor in the driver chip of the display. In addition to the fact that the driver chip itself is at a high temperature during operation, it is also easily affected by the temperature of the surrounding backlight module and other heating elements, making it sense The detected temperature is not accurate, and it may require a longer sensing waiting time, making it impossible to sense a more accurate ambient temperature in real time, and it is difficult to switch the display device to an optimal setting in real time.

In order to solve the above problems, the present disclosure provides a display device including a display, a memory, at least one sensor, and a processor. The display is used for displaying images. The memory is used to store the look-up table. At least one sensor is used to provide at least one auxiliary information. The processor is coupled to the display, the memory and at least one sensor. The processor is used to obtain corresponding temperature information according to the look-up table and at least one auxiliary information, and to adjust the display according to the temperature information.

Another aspect of the present disclosure provides a display method including the following steps. Obtain auxiliary information through sensors. Obtain temperature information based on auxiliary information. A first set value corresponding to the temperature information is acquired by the processor. The image displayed by the display is adjusted by the processor according to the first setting value.

All terms used herein have their ordinary meanings. The definitions of the above-mentioned words in the commonly used dictionaries, and the usage examples of any words discussed here in the content of this specification are only examples, and should not limit the scope and meaning of the disclosure. Likewise, the present disclosure is not limited to the various embodiments shown in this specification.

In this document, terms such as first, second and third are used to describe various elements, components, regions, layers and/or blocks to be understood. But these elements, components, regions, layers and/or blocks should not be limited by these terms. These terms are limited to identifying a single element, component, region, layer and/or block. Therefore, a first element, component, region, layer and/or block hereinafter may also be referred to as a second element, component, region, layer and/or block without departing from the original meaning of the present application. As used herein, "and/or" includes any one or all combinations of one or more associated items.

As used herein, "coupling" or "connection" can refer to two or more components that are in direct physical or electrical contact with each other, or indirect physical or electrical contact with each other, and can also refer to two or more elements. Components operate or act on each other.

Please refer to FIG. 1 , which is a schematic diagram of a display device 100 according to some embodiments of the present disclosure. As shown in FIG. 1 , the display device 100 includes a display 110 , a memory 120 , a sensor 130 and a processor 140 . In some embodiments, the processor 140 is coupled to the display 110 , the memory 120 and the sensor 130 , and the processor 140 is configured to use the auxiliary information S1 provided by the sensor 130 and the look-up table 121 stored in the memory 120 , deduce the temperature of the display 110, so as to adjust the image displayed on the display 110 to the set value corresponding to the temperature. In some embodiments, the processor 140 can adjust the display 110 by adjusting the signal S2 to the display 110 , and the specific adjustment method is described in the following paragraphs.

The above-mentioned display device 100 may be a touch display device. The touch display device includes a display, a touch unit, a sensor and a processor. In some embodiments, the touch unit is disposed in the display. The display, sensor and processor are coupled as above.

In some embodiments, the display device 100 can be a mobile device such as a mobile phone, a tablet, a computer, a smart watch, a navigation device, or a display device in a vehicle system, as long as it is any device that can display images, that is, in this disclosure within the scope covered.

In some embodiments, the memory 120 is used for storing a look-up table (look-up table) 121 corresponding to the image displayed on the display 110 . In some embodiments, the lookup table 121 includes data such as color temperature, contrast, color saturation, demura, and gamma curve corresponding to the temperature information. For example, under the same temperature condition, the curve corresponding to the gray scale and the brightness of the image displayed on the display 110 may be called a gamma curve. However, under different temperature conditions, the change of the divided voltage caused by the change of the resistance characteristics of the driving chip in the display 110 and the change of the permeability of the liquid crystal molecules in the display 110 will affect the corresponding relationship between the gray scale and the brightness. In other words, under the same gray scale, different brightnesses will be reflected when corresponding to different temperatures. Therefore, in order to adapt the display 110 to different temperatures, the memory 120 can store multiple sets of gamma curves corresponding to the relationship between gray scale and brightness under different temperature conditions, so that the display 110 can use the gamma curves stored in the memory 120 to Make adjustments corresponding to different temperatures.

It should be noted that, in addition to the above-mentioned gamma curve, parameters such as color temperature, contrast, color saturation, and uniform chromaticity (mura) of the display 110 will also change corresponding to different temperatures, and corresponding adjustments or compensations are required. Therefore, the look-up table 121 corresponding to different temperatures and/or different parameter correspondences can be stored in the memory 120 for adjustment by the display 110 , and the present disclosure is not limited to the above parameters.

In some embodiments, the sensor 130 is used to provide at least one auxiliary information S1. In some embodiments, the auxiliary information S1 includes at least one of resistance value, capacitance value, threshold voltage value, regional information or battery capacity information.

Please refer to Figure 1 and Figure 2 at the same time. FIG. 2 is a schematic diagram of the sensor 130 shown in FIG. 1 according to some embodiments of the present disclosure. In some embodiments, a plurality of sensors 130 are disposed around the display 110 . In some other embodiments, a plurality of sensors 130 are disposed in the non-display area NDA marked with oblique dots on the display 110 .

In some embodiments, as shown in FIG. 2, when a sensor 130 is respectively provided in eight positions of the upper, lower, left, right, upper left, upper right, lower left, and lower right of the display 110, the The sensor 130 provides auxiliary information S1 corresponding to eight different locations. In some embodiments, the processor 140 may calculate the respective temperatures of the eight positions according to the above-mentioned auxiliary information S1 , and then calculate the average value thereof as the temperature at the central position of the display 110 . In other embodiments, the sensor 130 can also be used to convert the auxiliary information S1 into temperature information, as long as the cooperative operation between the sensor 130 and the processor 140 is used to calculate the temperature information based on the sensed auxiliary information S1 The temperature operation mode of the display 110 is within the scope of the present disclosure.

In some embodiments, one or more sensors 130 can be arranged at any position around the display 110, and the auxiliary information S1 (for example: resistance value) provided by each sensor 130 or corresponding to the above-mentioned auxiliary information S1 The temperature is multiplied by a corresponding weight to calculate its weighted average as the temperature at the center of the display 110 . In other words, in other embodiments, the number and location of the sensors 130 are not limited to those shown in FIG. 2 .

In some embodiments, the plurality of sensors 130 may be resistive temperature sensors, which may be comprised of silver, gold, aluminum, molybdenum, nickel, iron, tungsten, copper, platinum, zinc, indium tin oxide (ITO) , nano-silver (SNW) and other materials, this disclosure is not limited to the above-mentioned elemental materials, as long as it is a material that changes the state of motion of atoms or lattices with temperature changes and changes in resistance value, it is included in this disclosure. within the scope covered. By setting an element whose resistance value changes with temperature, the current temperature can be calculated by measuring the resistance value. For example, when R0 is the resistance value at temperature T0, R is the resistance value at temperature T, and α is the temperature coefficient of resistance, where R0, T0, and α are known values, then by measuring the resistance R Substitute the resistance calculation formula R=R0[1+α(T-T0)] to calculate the current temperature T.

In some embodiments, each sensor 130 provides auxiliary information S1 in the form of resistance value by sensing the resistance value, and uses the resistance value calculation formula to calculate the temperature of each position point and then transmit the obtained temperature information to the processor 140 to calculate and obtain the core temperature of the display 110 through the processor 140 . In some embodiments, the sensor 130 can transmit the auxiliary information S1 expressed in the form of resistance value to the processor 140, and the processor 140 can use the resistance value calculation formula to calculate the temperature of each position point, and then calculate the temperature of the display. 110 temperature (for example: central point temperature).

Please refer to Figures 1 and 2 at the same time. In some embodiments, a redundant pixel (Dummy pixel) is disposed on the edge of the display area of the display 110 as shown in FIG. 2, and includes at least one data line, at least one gate line, a plurality of transistors and a plurality of capacitors . In some embodiments, the redundant pixels are disposed in the area of the display 110 that is shaded by the frame of the display device 100 .

In some embodiments, the capacitor may be a storage capacitor in a pixel or a liquid crystal capacitor. In other embodiments, the capacitor may be a capacitor on the display and/or the touch unit of the touch panel coupled to the voltage source Vcom (not shown in the figure), and the present disclosure is not limited to the arrangement of the above capacitor.

In some embodiments, using the characteristic that the dielectric coefficient of the capacitor changes with temperature, the sensor 130 can measure the capacitance value of the capacitor at different temperatures to provide auxiliary information S1 expressed in the form of capacitance value, and then use The corresponding temperature value is calculated by the processor 140 through a formula. For example, when ε is the dielectric constant of the medium between the capacitor plates, A is the area of the plates, and d is the distance between the plates, since ε will vary with temperature, the capacitance value calculation formula C= εA/d, the dielectric constant ε is deduced from the capacitance value, and then the temperature corresponding to the measured capacitance value is obtained by using the corresponding relationship between the dielectric constant ε and temperature stored in the memory 120 .

In some embodiments, the display device 100 may include a plurality of sensors 130 for measuring capacitance values. The sensors 130 are used to measure the capacitance values of a plurality of capacitors located at different locations and obtain corresponding temperature values, and then The temperature values are directly averaged or weighted averaged by the processor 140 to obtain the central temperature of the display 110 . The calculation method is similar to the calculation method of the aforementioned sensing resistor value, and will not be repeated here for simplification.

In some embodiments, the sensor 130 uses the threshold voltage Vth of the transistor as auxiliary information. For example, when Id is the current passing through the transistor, Vgs is the voltage across the gate and source of the transistor, and k is a constant proportional to the channel width of the transistor and inversely proportional to the length of the channel of the transistor, the quantity The measured current Id and voltage Vgs are substituted into the current formula Id=1/2k(Vgs-Vth)^2 to obtain the auxiliary information S1 represented by the threshold voltage value Vth, and the processor 140 reuses the threshold value stored in the memory 120 The correspondence between the voltage value Vth and the temperature is obtained by obtaining a temperature value corresponding to the calculated threshold voltage value Vth.

In some embodiments, the display device 100 may include a plurality of sensors 130 for measuring and calculating the threshold voltage Vth, so as to measure the threshold voltage Vth of a plurality of transistors at different positions and obtain the corresponding temperature. The temperature is directly averaged or weighted averaged by the processor 140 to obtain the central temperature of the display 110. The calculation method is similar to the calculation method of the aforementioned sensing resistance value, and will not be repeated here for simplification.

In some embodiments, the sensor 130 can be used to sense the regional information as the auxiliary information S1, and then the processor 140 uses the corresponding relationship between the regional information stored in the memory 120 and the temperature and time to obtain the corresponding temperature. . In some embodiments, the geographic information includes latitude and longitude information and/or altitude information. For example, if the memory 120 contains an average temperature of 28.3 degrees at 7:00 pm on August 14th in Dongshi District, Taichung City within 10 years, then when the sensor detects that it is located in Dongshi District or corresponding to the longitude and latitude information of Dongshi District, the processor 140 can deduce that 28.3 degrees is used as the current temperature information according to the information in the above-mentioned memory 120 .

In some embodiments, as shown in FIG. 1 , the display device 100 further includes a battery 150 , wherein the battery 150 is coupled to the sensor 130 . The sensor 130 can be used to sense the output voltage of the battery 150 , and then the processor 140 uses the corresponding relationship between the output voltage and the temperature stored in the memory 120 to obtain the corresponding temperature. In detail, because the actual output voltage of the battery will change with the ambient temperature (for example, a battery that outputs 17 volts in a tropical area may only output 7 volts in a cold area), because the characteristics of the battery voltage changing with temperature can be used to pre-establish and The lookup table is stored in the memory 120 , and the processor 140 can obtain the temperature corresponding to the measured output voltage according to the lookup table in the memory 120 as the current temperature information.

It should be noted that the sensor 130 is not limited to measuring auxiliary information S1 such as the above-mentioned resistance value, capacitance value, threshold voltage, and regional information. As long as it is auxiliary information S1 that can be used to correspond to temperature information, it is within the scope of this disclosure. . In addition, the sensor 130 can be used to measure different types of auxiliary information S1 at the same time, and the present disclosure is not limited to the above-mentioned arrangement position, quantity and calculation method.

In some embodiments, after the processor 140 adjusts the image displayed on the display 110 by the above method, the sensor 130 is further used to sense the acceleration or speed of the display device 100 to determine the moving state of the display device 100 . In some embodiments, when the display device 100 is moving at a low speed (eg, less than 10 km/h), the sensor 130 and/or the processor 140 may switch to a sleep state, and the processor 140 will no longer perform any processing on the display. Adjustment.

In some embodiments, when the display device 100 moves at a high speed (for example: greater than 10 km/h), the sensor 130 and/or the processor 140 will not switch to the sleep state, but maintain the aforementioned set value, sensing The sensor 130 and the processor 140 perform the above operations of sensing and estimating the temperature, and then use the look-up table 121 in the memory 120 to obtain a set value to dynamically adjust the image displayed on the display 110 . Or the sensor 130 is used to sense again and provide the above-mentioned auxiliary information S1, and after the processor 140 obtains the corresponding temperature information that is the same as or different from the previous time, the display 110 is adjusted according to the temperature information, so that the display 110 The displayed image can be adjusted to the set value at each temperature. In a further embodiment, the sensor 130 will perform sensing again when the display device is installed in an environment without air conditioning and in a high-speed environment. In a further embodiment, when the display device is installed in an air-conditioned and high-speed environment, the sensor 130 uses the temperature value set by the air conditioner for adjustment.

In summary, the display device 100 can provide auxiliary information S1 including resistance value, capacitance value, threshold voltage value, regional information and/or battery voltage information through one or more sensors 130 disposed around the display 110 , to further calculate the temperature information of the environment where the display device 100 is located, so that the processor 140 can adjust the display 110 according to the temperature information. In the above-mentioned embodiment, the sensor 130 is less likely to be affected by the heat of the backlight element or the battery to affect the accuracy of the temperature calculation. Adjustments are made to the display 110 .

FIG. 3 is a flowchart of a display method 300 according to some embodiments of the present disclosure. The display method 300 is applicable to a display device, and includes step S302, step S304, step S306 and step S308.

In step S302 , the auxiliary information S1 is obtained through the sensor 130 . In some embodiments, the auxiliary information S1 may be resistance value, capacitance value, threshold voltage value, regional information, battery voltage information or a combination thereof.

In step S304, temperature information is obtained according to the auxiliary information S1. In some embodiments, the temperature information corresponding to one or more auxiliary information S1 can be directly calculated by the sensor 130, or the corresponding temperature information can be obtained by the processor 140 according to the look-up table 121 stored in the memory 120. Temperature information in one or more auxiliary information S1. In some embodiments, the temperature information of the display 110 can be obtained by direct averaging or weighted averaging.

In step S306 , a first set value corresponding to the aforementioned temperature information is obtained by the processor 140 . In some embodiments, the processor 140 is based on the look-up table of the corresponding relationship between temperature and image adjustment parameters (such as color temperature, contrast, color saturation, demura compensation, gamma curve, etc.) in the look-up table 121 stored in the memory 120 , to obtain the first set value.

In step 308, the image displayed on the display 110 is adjusted by the processor 140 according to the first setting value. In some embodiments, the processor 140 generates and transmits the adjustment signal S2 to the display 110 according to the first setting value, so as to adjust the image displayed on the display 110 . In some embodiments, the display 110 adjusts the color temperature, contrast, color saturation, demura compensation, gamma curve, etc. of the displayed image according to the adjustment signal S2 to present an optimal state.

In some embodiments, the display method 300 uses the sensor 130 to measure a resistance value of a resistor adjacent to the display 110 , and obtains corresponding temperature information of the display device 100 according to the measured resistance value.

In some embodiments, the sensor 130 measures the capacitance value of the capacitor adjacent to the display 110, and according to the measured capacitance value and the look-up table 121 stored in the memory 120 including the correspondence between the capacitance value and the temperature information, The corresponding temperature information of the display device 100 is obtained.

In some embodiments, the display method 300 uses the sensor 130 to measure and calculate the threshold voltage value of the transistor adjacent to the display 110, and includes the threshold voltage value and the threshold voltage value stored in the memory 120 according to the calculated threshold voltage value and The look-up table 121 of the corresponding temperature information obtains the corresponding temperature information of the display device 100 .

In some embodiments, the display method 300 obtains the region information of the display device 100 through the sensor 130, and obtains the display device according to the region information and the look-up table 121 stored in the memory 120 including the correspondence between region information and temperature information. The corresponding temperature information of 100. In some embodiments, the geographic information includes latitude and longitude information and/or altitude information.

In some embodiments, the display method 300 uses the sensor 130 to obtain the output voltage of the battery 150 in the display device 100, and according to the output voltage and the look-up table stored in the memory 120 including the corresponding relationship between the output voltage of the battery and the temperature information 121. Obtain corresponding temperature information of the display device 100. In some embodiments, the geographic information includes latitude and longitude information and/or altitude information.

In some embodiments, the display method 300 further includes sensing the acceleration or speed of the display device 100 (or the display 110 ) by the sensor 130 disposed in the display device 100 to determine the movement status of the display device 100 .

In some embodiments, the display method 300 further includes when it is known that the display device 100 is in a high-speed state according to the acceleration information or speed information measured by the sensor, and the display device 100 and the display 110 included therein are set at In an environment without an air-conditioning system, the sensor 130 can perform steps S302 and S304 again, and the processor 140 adjusts parameters (such as color temperature, contrast, color saturation, Demura compensation, gamma curve, etc.) corresponding lookup table to obtain the second set value, wherein the second set value is the same as or different from the first set value. In the above-mentioned embodiments, since there may be large temperature changes in an environment without an air-conditioning system, the operations in the display method 300 may be performed multiple times to adjust the image displayed by the display device 100 in real time.

In some embodiments, the display method 300 further includes generating a new adjustment signal S2 by the processor 140 according to the second setting value, and sending the adjustment signal S2 to the display 110 to adjust the image displayed by the display 110 .

To sum up, the display device and the display method provided by the present disclosure can sense auxiliary information corresponding to temperature information by arranging the sensor in a region of the display device where there is less interference from component heat sources, and by pre-existing The look-up table in the memory obtains image adjustment curves or parameters corresponding to different temperature information. By means of the above-mentioned setting method, the display can be dynamically and real-time adjusted to optimize the displayed image.

Although this case has disclosed the above in the way of implementation, it does not limit this case. Anyone who is familiar with this technology can make various changes and modifications without departing from the spirit and scope of this case. Therefore, the scope of protection of this case should be regarded as attached The one defined in the scope of the patent application shall prevail.

100: display device 110: Display 120: memory 121:Lookup table 130: sensor 140: Processor 150: battery S1: Auxiliary information S2: Adjust the signal NDA: non-display area 300: display method S302, S304, S306, S308: steps

In order to make the above and other purposes, features, advantages and embodiments of the present disclosure more comprehensible, the accompanying drawings are described as follows: FIG. 1 is a schematic diagram of a display device according to some embodiments of the disclosure. FIG. 2 is a schematic diagram of the sensor shown in FIG. 1 according to some embodiments of the present disclosure. FIG. 3 is a flowchart of a display method according to some embodiments of the present disclosure. In accordance with common practice, the various features and elements in the drawings are not drawn to scale, but are drawn in a manner to best present specific features and elements relevant to the case. In addition, the same or similar reference numerals refer to similar elements/components in different drawings.

100: display device

110: Display

120: memory

121:Lookup table

130: sensor

140: Processor

150: battery

S1: Auxiliary Information

S2: Adjust the signal

Claims (11)

A display device, comprising: a display for displaying an image; a memory for storing a look-up table; at least one sensor for providing at least one auxiliary information, wherein the at least one auxiliary information includes a resistance value , a capacitance value, a threshold voltage value, a region information, a battery voltage information or a combination thereof; and a processor, coupled to the display, the memory and the at least one sensor, the processor is used for searching according to the The table and the at least one auxiliary information are used to obtain a corresponding temperature information, and to adjust the display according to the temperature information. The display device as claimed in claim 1, wherein the at least one sensor is disposed in a non-display area of the display. The display device as claimed in claim 1, wherein the processor is further configured to obtain the corresponding temperature information according to a weighted average of the at least one auxiliary information. A display method, which is used in the display device according to any one of claims 1 to 3, the display method comprising: obtaining an auxiliary information by a sensor, wherein the auxiliary information includes a resistance value adjacent to a display , a capacitance value, a threshold voltage value, a region information, a battery voltage information or a combination thereof; Obtain a temperature information through a first lookup table according to the auxiliary information; obtain a first temperature information corresponding to the temperature information through a processor according to a second lookup table that records the correspondence between the temperature information and an image adjustment parameter a setting value; and adjusting an image displayed by a display according to the first setting value by the processor. The display method according to claim 4, wherein obtaining the temperature information through the first lookup table according to the auxiliary information includes: obtaining the temperature information according to the resistance value. The display method according to claim 4, wherein obtaining the temperature information through the first lookup table according to the auxiliary information includes: obtaining the temperature information according to the capacitance value. The display method according to claim 4, wherein obtaining the temperature information through the first lookup table according to the auxiliary information includes: obtaining the temperature information according to the threshold voltage value. The display method as described in claim 4, wherein obtaining the temperature information through the first lookup table according to the auxiliary information includes: obtaining the temperature information according to the region information. The display method as described in Claim 8, wherein the region information The information includes latitude and longitude information and altitude information. The display method according to claim 4, wherein obtaining the temperature information through the first lookup table according to the auxiliary information includes: obtaining the temperature information according to the battery voltage information. The display method as described in claim 8 or 10 further includes: sensing acceleration information or speed information of the display; when judging that the display is in a high-speed state according to the acceleration information or the speed information, and the display is in a When there is no air-conditioning environment, a second setting value corresponding to the non-air-conditioning environment is obtained by the processor; and the image displayed by the display is adjusted by the processor according to the second setting value.

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