TW201340077A - Display device - Google Patents

Abstract

A display device includes a display, a light sensing unit, and a controlling unit. A receiving hole is defined on a middle of the top of the display. The light sensing unit is received in the receiving hole, and capable of sensing an environmental brightness of the display device periodically. The controlling unit is connected to the light sensing unit, and used to obtain the environmental brightness value, and determines a brightness level corresponding to the current environmental brightness. The controlling unit determines whether the current brightness level is different from the historical brightness level. If yes, the controlling unit adjusts the brightness of the display device at least based on the current brightness unit.

Description

Display device

The present invention relates to a display device, and more particularly to a display device capable of automatically adjusting its own brightness.

Currently, most displays have a light sensor to capture the ambient brightness and automatically adjust the display brightness based on the ambient brightness. For example, when the light sensor senses that the ambient light is bright, the control unit inside the display increases the brightness of the display, so that the human eye can clearly see what the display displays. When the anti-light sensor senses that the ambient light is dim, the control unit inside the display lowers the brightness of the display to avoid the glare of the display. However, during operation, conventional light sensors often fail to accurately sense external light due to external interference. For example, when the user accidentally covers the light sensor with a hand or other object, and the light of the actual environment does not change too much, the light sensor may mistake the ambient brightness at this time, thereby The control unit automatically lowers the brightness of the display, causing inconvenience to the user.

In view of the above, it is necessary to provide a display device that can accurately adjust its brightness according to changes in ambient brightness.

A display device includes a display unit, a light sensing unit, and a control unit. The top of the display unit has a receiving hole at an upper portion thereof. The apex angle of the vertical section of the receiving hole is an obtuse angle. The light sensing unit is disposed in the receiving hole. The control unit is electrically connected to the light sensing unit for obtaining the ambient brightness value sensed by the light sensing unit to determine the current ambient brightness value. Corresponding to the current brightness level, and determining whether the current brightness level changes with respect to a historical brightness level. If a change occurs, the display brightness of the display unit is adjusted according to the current brightness level.

By providing the light sensing unit on the top of the display unit, the display device can effectively prevent the user from accidentally touching, thereby erroneously increasing or decreasing the brightness thereof. In addition, the display device only needs to set the apex angle of the vertical section for accommodating the accommodating hole of the light sensing sheet to an obtuse angle, thereby maximally collecting the light of the surrounding environment of the display device, thereby improving the sensing precision. convenient.

Referring to FIG. 1 , a display device 100 according to a preferred embodiment of the present invention can be applied to any electronic product having a display function, such as a computer, a tablet computer, or a mobile phone. The display device 100 includes a display unit 10, a light sensing unit 20, a control unit 30, and a storage unit 40.

As shown in FIG. 2 , a receiving hole 11 is defined in the middle of the top of the display unit 10 for receiving the light sensing unit 20 . The apex angle α of the vertical section of the accommodating hole 11 is an obtuse angle, for example, 120 degrees.

The light sensing unit 20 is disposed in the receiving hole 11 for periodically sensing the brightness value of the surrounding environment of the display device 100. In this embodiment, since the apex angle α of the vertical section of the accommodating hole 11 is an obtuse angle, the light sensing unit 20 can collect the light of the surrounding environment of the display device 100 to the maximum extent to sense the display device 100. The brightness of the surrounding environment, in order to avoid misjudgment. Specifically, please refer to FIG. 3 together, assuming that the display device 100 is in the environment where three lights A, B, and C are disposed, and the three lights A, B, and C are normally illuminated, if the display is The apex angle β of the vertical section of the hole 11 is an acute angle. For example, when the angle is 45 degrees, the light sensing unit 20 can only partially receive the light emitted by the lamp B or the lamp C, thereby erroneously determining that the brightness of the surrounding environment of the display device 100 is low. . When the apex angle α of the vertical section of the accommodating hole 11 is an obtuse angle, the light sensing unit 20 can sense the light emitted by the lamps A, B, and C to the maximum extent, thereby improving the sensing accuracy of the light sensing unit 20. .

The control unit 30 is connected to the light sensing unit 20, and is configured to determine a current brightness level corresponding to the current ambient brightness value according to the ambient brightness value sensed by the light sensing unit 20, and store the current brightness level in the storage in real time. In unit 40, the historical brightness level recorded in the storage unit 40 is updated. The historical brightness level refers to the brightness level corresponding to the brightness value of the last sensing environment of the light sensing unit 20. The control unit 30 is further configured to: when determining that the brightness level corresponding to the current ambient brightness value sensed by the light sensing unit 20 changes relative to the historical brightness level in the storage unit 40, according to the ambient brightness value sensed by the light sensing unit 20 The display brightness of the display unit 10 is adjusted corresponding to the current brightness level.

In this embodiment, the brightness level is divided into ten levels, and each brightness level corresponds to an ambient brightness value within a certain range. For example, brightness level 1 corresponds to an ambient brightness value of 0-10 candelas. In the present embodiment, the brightness level 1 indicates that the ambient brightness value is the lowest, and the brightness level 10 indicates that the ambient brightness value is the highest. Therefore, the control unit 30 determines the brightness level corresponding to the ambient brightness value by determining the range of the interval in which the ambient brightness value sensed by the light sensing unit 20 is located.

A comparison table is further pre-stored in the storage unit 40, and the comparison table lists the optimal display brightness of the display unit 10 corresponding to each brightness level, that is, the theoretical display brightness, such as the corresponding display unit when the brightness level is 1. The theory of 10 shows a brightness of 10%. When the brightness level is 2, the theoretical display brightness of the corresponding display unit 10 is 20%. Therefore, after the control unit 30 determines the current brightness level corresponding to the ambient brightness value sensed by the light sensing unit 20, the theoretical display brightness corresponding to the current brightness level can be obtained according to the comparison table, and according to the current brightness. The theoretical display brightness corresponding to the level adjusts the display brightness of the display unit 10 accordingly.

It can be understood that the light sensing unit 20 periodically senses that the current brightness of the environment is performed when the display device 100 is in a non-sleep state. When the display device 100 is in the sleep state, the light sensing unit 20 is also in a sleep state, thereby avoiding waste of power caused by adjusting the display brightness of the display device 100 when the user does not use the display device 100.

It can be understood that the period may be a period value set by the user or a preset period value preset by the display apparatus 100 at the time of shipment. The smaller the period value is set, the more sensitive the adjustment of the brightness of the display unit 10 is, and at the same time, the power consumption is also increased. In the actual use process, an appropriate period value can be selected according to requirements to achieve equalization.

It can be understood that the light sensing unit 20 can be, but is not limited to, a photodiode, a phototransistor, and a photoresistor. Different types of light sensing units 20 deliver different parameter indicators. For example, photodiodes and phototransistors react to changes in brightness by changes in their current. The photoresistor reflects the change in brightness by a change in its current or a change in voltage across it. The current brightness information of the environment sensed by the total light sensing unit 20 is reflected by the form of electrical signals such as the current flowing through the photosensitive device or the voltage across the photosensitive device.

It can be understood that the upper portion of the display unit 10 can also be made of a transparent material, so that the light of the surrounding environment of the display device 100 can be transmitted to the light sensing unit 20 through the transparent material to the maximum extent, thereby improving the light sensing unit 20 . Sensing accuracy, to avoid misjudgment.

The operation of the display device 100 will be described in detail below.

First, the light sensing unit 20 periodically senses the brightness value of the surrounding environment of the display device 100. Then, the control unit 30 determines a corresponding current brightness level according to the ambient brightness value generated by the light sensing unit, and compares the current brightness level with the historical brightness level in the storage unit 40. If the control unit 30 determines that the current ambient brightness level changes relative to the historical brightness level, the display brightness of the display unit 10 is adjusted according to the current brightness level. At the same time, the control unit 30 stores the current brightness level in the storage unit 40 to update the historical brightness level recorded in the storage unit 40 for the next comparison.

Obviously, by providing the light sensing unit 20 on the top of the display unit 10, the display device 100 can effectively prevent the user from accidentally touching, thereby erroneously increasing or decreasing the brightness thereof. In addition, the display device 100 only needs to set the apex angle α of the vertical section for accommodating the accommodating hole 11 of the light sensing unit 20 to an obtuse angle, thereby maximally collecting the light of the surrounding environment of the display device 100, thereby improving Sensing accuracy is very convenient.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be covered by the following claims.

100. . . Display device

10. . . Display unit

11. . . Socket hole

20. . . Light sensing unit

30. . . control unit

40. . . Storage unit

1 is a functional block diagram of a display device in accordance with a preferred embodiment of the present invention.

2 is a schematic view of the display device of FIG. 1.

3 is a schematic view showing a state in which the apex angle of the accommodating hole in the display device shown in FIG. 1 is set to an obtuse angle and an acute angle.

10. . . Display unit

11. . . Socket hole

20. . . Light sensing unit

Claims (7)

A display device includes a display unit, a light sensing unit, and a control unit. The improvement is that the top of the display unit has a receiving hole at an upper middle portion thereof, and the apex angle of the vertical section of the receiving hole is an obtuse angle, and the light sensing unit is disposed at The accommodating hole is configured to periodically sense the brightness of the surrounding environment of the display device, and the control unit is electrically connected to the light sensing unit for obtaining an ambient brightness value sensed by the light sensing unit to determine The current ambient brightness value corresponds to the current brightness level, and determines whether the current brightness level changes with respect to a pre-recorded historical brightness level. If a change occurs, the display brightness of the display unit is adjusted according to the current brightness level. The display device of claim 1, wherein the brightness level is divided into ten levels, each brightness level corresponds to an ambient brightness value within a certain range, and the control unit determines that the light sensing unit senses the current The range of the range in which the ambient brightness value is located, thereby determining the brightness level corresponding to the ambient brightness value. The display device of claim 1, wherein the display device comprises a storage unit, and the storage unit is configured to store the historical brightness level. The display device of claim 3, wherein the storage unit further stores a comparison table listing theoretical display brightness of the display unit corresponding to the brightness level, the control unit according to The comparison table determines the theoretical display brightness corresponding to the current brightness level, and adjusts the display brightness of the display unit according to the theoretical display brightness. The display device of claim 1, wherein the historical brightness level is a brightness level corresponding to a brightness value of the last sensing environment of the light sensing unit. The display device of claim 1, wherein the light sensing unit is a photosensitive diode, a phototransistor or a photoresistor. The display device of claim 1, wherein the top of the display unit is made of a transparent material.