Display device and display method
By setting a one-way transmission layer, a light detection layer and a light adjustment layer on the display panel, and actively emitting light with ambient light and OLED, the problem of high energy consumption during high-brightness display is solved, and the effect of brightness uniformity and energy consumption reduction is achieved.
Patent Information
- Application Number
- CN202411337172.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2024-12-31
AI Technical Summary
In the prior art, when realizing high brightness display, the energy consumption of the display device is high, especially in the high brightness environment, the power consumption of OLED devices increases sharply, resulting in a decrease in life.
The light-out side of the display panel is provided with a one-way transmission layer, a light detection layer and a light adjustment layer. The controller adjusts the light-out intensity of the display panel and the transmittance of the light adjustment layer based on the light intensity and display data detected by the light detection layer. Realize active and passive collaborative display, active display or passive display, and use ambient light as a passive light source to actively emit OLED.
While meeting the brightness target, the energy consumption of the display device is reduced, the display brightness uniformity and display effect are improved, and the service life of OLED devices is extended.
Smart Images
Figure CN119233718A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of display technology, and more specifically, to a display device and a display method. Background Art
[0002] At present, there are problems in the related art such as high energy consumption of the display device when achieving high brightness display. Summary of the invention
[0003] The purpose of the present disclosure is to provide a display device and a display method to solve at least one of the problems existing in the prior art.
[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:
[0005] A first aspect of the present disclosure provides a display device, comprising a display panel, and a one-way transmission layer, a light detection layer, and a light adjustment layer stacked in sequence on a light-emitting side of the display panel, and also comprising a controller;
[0006] The one-way transmission layer is used to transmit incident light close to the display panel and reflect incident light away from the display panel;
[0007] The controller is used to control the light intensity of the display panel and / or the light transmittance of the light adjustment layer according to the light intensity and display data detected by the light detection layer.
[0008] Optionally, the display panel includes a plurality of sub-pixels arranged in an array, and the display device further includes a color filter layer located on a side of the light regulation layer away from the display panel, the color filter layer includes a plurality of filter layers arranged in an array, and the filter layer has an orthographic projection on the display panel located within the sub-pixel.
[0009] Optionally, the display panel includes a plurality of first sub-pixels, a plurality of second sub-pixels and a plurality of third sub-pixels arranged in an array, the color film layer includes a plurality of first filter layers, a plurality of second filter layers and a plurality of third filter layers arranged in an array, the orthographic projection of the first filter layer on the display panel is located within the first sub-pixel, the orthographic projection of the second filter layer on the display panel is located within the second sub-pixel, and the orthographic projection of the third filter layer on the display panel is located within the third sub-pixel.
[0010] Optionally, the color filter layer further includes a black matrix layer located between adjacent filter layers.
[0011] Optionally, the light adjustment layer includes a liquid crystal layer.
[0012] Optionally, an orthographic projection of the one-way transmission layer on the display panel coincides with the display panel.
[0013] Optionally, the orthographic projection of the light detection layer on the display panel coincides with the orthographic projection of the one-way transmission layer on the display panel.
[0014] Optionally, an orthographic projection of the light regulating layer on the display panel coincides with an orthographic projection of the one-way transmission layer on the display panel.
[0015] Optionally, the display panel is an organic electroluminescent display panel.
[0016] A second aspect of the present disclosure provides a display method based on the display device, comprising the display panel emitting display light, and the controller controlling the light intensity of the display panel and the light transmittance of the light adjustment layer according to the light intensity and display data detected by the light detection layer; or
[0017] The display panel does not emit display light, and the controller controls the light transmittance of the light adjustment layer according to the light intensity and display data detected by the light detection layer.
[0018] The beneficial effects of the present disclosure are as follows:
[0019] The technical solution disclosed in the present disclosure can realize active and passive coordinated display, and can also realize active display or passive display by setting a one-way transmission layer, a light detection layer and a light adjustment layer on the light-emitting side of the display panel. When there is no ambient light, active display can be performed; when there is ambient light, passive display can be performed, or active and passive coordinated display can be performed, so as to reduce the energy consumption of the display device while meeting the brightness target. At the same time, the display brightness of the display device is made more uniform, which improves the display effect of the display device. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The specific implementation methods of the present disclosure are further described in detail below with reference to the accompanying drawings.
[0021] Figure 1 A schematic structural diagram of a display device provided in an embodiment of the present disclosure is shown.
[0022] Figure 2 A schematic diagram of the structure of a light detection layer in a display device provided in an embodiment of the present disclosure is shown.
[0023] Figure 3 A schematic diagram of the structure of a light adjustment layer in a display device provided in an embodiment of the present disclosure is shown. DETAILED DESCRIPTION
[0024] The terms “on”, “formed on” and “disposed on” in the present disclosure may mean that one layer is directly formed or disposed on another layer, or may mean that one layer is indirectly formed or disposed on another layer, i.e., there are other layers between the two layers.
[0025] It should be noted that, although the terms "first", "second", etc. may be used herein to describe various parts, components, elements, regions, layers and / or parts, these parts, components, elements, regions, layers and / or parts should not be limited by these terms. Instead, these terms are used to distinguish one part, component, element, region, layer and / or part from another. Thus, for example, the first part, first member, first element, first region, first layer and / or first part discussed below may be referred to as the second part, second member, second element, second region, second layer and / or second part without departing from the teachings of the present disclosure.
[0026] In the present disclosure, unless otherwise specified, the term "same-layer arrangement" used refers to two layers, parts, components, elements or parts that can be formed by the same preparation process (such as a patterning process, etc.), and the two layers, parts, components, elements or parts are generally formed of the same material. For example, two or more functional layers are arranged in the same layer, which means that these functional layers arranged in the same layer can be formed using the same material layer and the same preparation process, thereby simplifying the preparation process of the display substrate.
[0027] In the present disclosure, unless otherwise specified, the expression "patterning process" generally includes steps such as photoresist coating, exposure, development, etching, photoresist stripping, etc. The expression "one-time patterning process" means a process of forming patterned layers, components, members, etc. using one mask.
[0028] At present, there are problems in the related art such as high energy consumption of display devices when achieving high-brightness display. Taking the Organic Light Emitting Diode (OLED) device as an example, its display panel has a wide range of applications and complex application environments, often involving outdoor or specific high-brightness environments. In a high-brightness environment, OLED needs to maintain high brightness or ultra-high brightness to ensure a good display. And if OLED needs to maintain high brightness, it must require a larger current to pass through the OLED light-emitting layer to produce brighter light. Long-term operation in this high-brightness environment will cause a sharp increase in OLED power consumption and severe heat generation, which will lead to a sharp decrease in the life of the OLED device or damage to the OLED device.
[0029] The relationship between brightness and OLED power consumption is usually nonlinear, which means that as brightness increases, the rate of increase in power consumption may accelerate. Therefore, when using OLED devices in high-brightness environments, reducing power consumption becomes a very important issue. At present, related technologies mainly focus on improving OLED materials to improve photoelectric conversion efficiency and reduce energy loss; or optimizing the circuit structure of OLED panels to improve energy efficiency and reduce power consumption. However, in high-brightness environments, these measures have limited improvement effects.
[0030] In view of this, an embodiment of the present disclosure provides a display device, including a display panel and a unidirectional transmission layer, a light detection layer and a light adjustment layer stacked in sequence on the light emitting side of the display panel, and also including a controller; the unidirectional transmission layer is used to transmit incident light close to one side of the display panel and reflect incident light away from one side of the display panel; the controller is used to control the light emitting intensity of the display panel and / or the light transmittance of the light adjustment layer according to the light intensity and display data detected by the light detection layer.
[0031] This embodiment can realize active and passive collaborative display, and can also realize active display or passive display by setting a one-way transmission layer, a light detection layer and a light adjustment layer on the light-emitting side of the display panel. When there is no ambient light, active display can be performed; when there is ambient light, passive display can be performed, or active and passive collaborative display can be performed to reduce the energy consumption of the display device while meeting the brightness target. For example, when there is ambient light, the display mode can be switched in response to user operation. At the same time, the display brightness of the display device is made more uniform, which improves the display effect of the display device.
[0032] In a specific example, Figure 1 As shown, the display device includes a display panel 100 (not shown in FIG. Figure 1 ) and a one-way transmission layer 200, a light detection layer 300 and a light adjustment layer 400 stacked in sequence on the light output side of the display panel 100.
[0033] Furthermore, the passive luminescence functional area is composed of a one-way transmission layer 200, a light detection layer 300 and a light adjustment layer 400.
[0034] In a specific example, Figure 1 As shown, the display panel 100 is an OLED display panel. Further, the display panel 100 includes a circuit layer 101 , a pixel definition layer 102 , an anode 103 , a light emitting layer 104 , a cathode 105 and an encapsulation layer 106 .
[0035] Furthermore, the circuit layer 101 controls the OLED to actively emit light.
[0036] Furthermore, an encapsulation layer 106 is provided above the light emitting layer 104 to protect the light emitting device and has extremely high transmittance.
[0037] In a specific example, Figure 1 As shown, the one-way transmission layer 200 transmits incident light close to the display panel 100 , such as X3 and X4 , and reflects incident light away from the display panel 100 , such as X1 and X2 .
[0038] In a specific example, Figure 1 As shown, the function of the one-way transmission layer 200 is to reflect ambient light, and the one-way transmission layer 200 has a low transmittance to ambient light and a high transmittance to the light of the emitting layer (EML) 104. That is, the one-way transmission layer 200 has a low transmittance and a high reflectance to the incident ambient light, and can reflect the ambient light and emit it through the filter layer to achieve the purpose of passive luminescence, ensuring that the external light source can be converted into passive luminescence; and has an extremely high transmittance for active luminescence, and can transmit the light emitted by the luminescent layer and emit it through the filter layer to achieve the purpose of active luminescence / or cooperative luminescence.
[0039] In a specific example, the roughness of the upper surface (eg, the reflective surface) of the one-way transmission layer is lower than the roughness of the lower surface (eg, the transmissive surface).
[0040] In a specific example, the material of the one-way transmission layer includes at least one of a nano-chromium mixed metal coating, a nano-aluminum mixed metal coating, and a composite coating of a nano-chromium layer and a nano-aluminum layer.
[0041] In a specific example, the one-way transmission layer can also be a composite film material, which includes a metal layer and two metal compound layers. The two metal compound layers are located on both sides of the metal layer. The metal layer can reflect the light emitted from the reflector, and the material can be Ag, Al, Cr or Cu, etc.; the two metal compound layers are used to increase the transmittance of the incident light from the other side and reduce the reflectivity. The material can be one or more of titanium nitride and tin oxide. The materials of the two metal compound layers can be the same or different.
[0042] In a specific example, Figure 1 As shown, the function of the light detection layer 300 is to detect the light intensity. Furthermore, the light detection layer 300 is filled with transparent photoelectric material, i.e., photoelectric effect material, which can convert the light intensity of the one-way transmission layer 200 into an electrical signal, and then feed the electrical signal back to the thin film field effect transistor (TFT) in the circuit layer 101 to control the light intensity of the light emitting layer 104.
[0043] In a specific example, Figure 2 As shown, the light detection layer includes a first electrode 301 and a second electrode 302 arranged along the thickness direction of the display panel 100, and a photoelectric conversion layer 303 located between the first electrode 301 and the second electrode 302. The photoelectric conversion layer 303 is used to convert the optical signal into an electrical signal.
[0044] Furthermore, when the light detection layer is a PIN junction, the first electrode may be a cathode and the second electrode may be an anode. In this case, the photoelectric conversion layer may convert the light intensity of the incident ambient light into a current or voltage signal and transmit the electrical signal to the controller.
[0045] In another specific example, the light detection layer includes a photosensitive element and a conversion element; wherein the photosensitive element is electrically connected to the conversion element; the photosensitive element is used to receive external light and convert the external light signal into an electrical signal; the conversion element is used to convert the electrical signal into a control signal and provide it to a controller.
[0046] Furthermore, the photosensitive element includes a photodiode, which includes a first substrate, a first electrode, a photoelectric conversion layer, a light-transmitting conductive layer, a first insulating layer and a second electrode arranged in sequence on the first substrate; the second electrode is electrically connected to the light-transmitting conductive layer through a via hole opened in the first insulating layer.
[0047] Furthermore, the conversion element includes a DC power supply and a first resistor, and the DC power supply, the first resistor and the photosensitive element are connected in series to form a closed loop; the current output end of the first resistor is electrically connected to the controller.
[0048] In a specific example, Figure 1 As shown, the light adjustment layer 400 has the function of controlling light transmittance and opacity; further, the material state of the filling area of the light adjustment layer 400 is controlled by an integrated TFT or other structure to achieve the effect of controlling whether to switch light transmittance.
[0049] In a specific example, the light adjustment layer is a liquid crystal control layer. Further, the liquid crystals are arranged in a disordered manner to achieve opacity or low light transmittance, and the liquid crystals are arranged in a consistent manner to achieve high light transmittance, so that when the active light does not emit light, the passive light can be controlled to emit light.
[0050] In another specific example, the light adjustment layer is an electronic ink control layer.
[0051] In yet another specific example, the light regulating layer is an interference control layer.
[0052] In a possible implementation, the light adjustment layer includes a liquid crystal layer.
[0053] In a specific example, Figure 3 As shown, when the light adjustment layer is a liquid crystal control layer, the light adjustment layer includes a first substrate 401 and a second substrate 402. The first substrate 401 and the second substrate 402 form a box gap relative to each other, and the box gap is filled with dye-doped nematic phase liquid crystal 403; the first substrate 401 includes a pixel electrode, and the second substrate 402 includes a common electrode.
[0054] Furthermore, the controller is electrically connected to the pixel electrode and the common electrode respectively, and is used to provide voltage signals to the pixel electrode and the common electrode respectively, so as to deflect the liquid crystal.
[0055] Furthermore, the entire pixel electrode is arranged in the first substrate 401, and the entire common electrode is arranged in the second substrate 402. The controller provides different voltage signals to the pixel electrode and the common electrode respectively, so that an electric field is generated between the pixel electrode and the common electrode. The liquid crystal 403 can be deflected under the action of the electric field, thereby achieving the required light transmittance.
[0056] In a specific example, the liquid crystal 403 uses negative liquid crystal. The short optical axis of the negative liquid crystal deflects with the electric field. When no electric field is applied, it is in the long white mode, and the light transmittance is the highest. After the electric field is applied, the liquid crystal deflects, and the light transmittance gradually decreases as the electric field increases. The light adjustment layer using negative liquid crystal has the highest light transmittance when no electric field is applied. When it is necessary to control the light transmittance of the light adjustment layer to decrease, an electric field needs to be applied. Therefore, the light adjustment layer using negative liquid crystal consumes less energy and is more economical to use.
[0057] In another specific example, the liquid crystal 403 may also be a positive liquid crystal. The long axis of the positive liquid crystal deflects with the electric field, and when no electric field is applied, it is a long black mode with the lowest light transmittance; when an electric field is applied, the liquid crystal deflects, and the light transmittance gradually increases with the increase of the electric field.
[0058] In a specific example, Figure 1 As shown, the controller is electrically connected to the light detection layer 300, the light adjustment layer 400 and the circuit layer 101, respectively, and is used to control the light intensity of the display panel 100 and / or the light transmittance of the light adjustment layer 400 according to the light intensity and display data detected by the light detection layer 300.
[0059] In a specific example, the controller may be integrated with a control chip of the display device.
[0060] In a specific example, the controller includes a storage module, which is used to store a mapping relationship table between voltage signals provided to pixel electrodes and common electrodes and control signals, and the controller is used to provide voltage signals to the pixel electrodes and common electrodes respectively according to the mapping relationship table.
[0061] Furthermore, by utilizing the optical properties of the liquid crystal in the light adjustment layer and controlling the deflection of the liquid crystal molecules through a controller, the light transmittance of the light adjustment layer is varied, thereby meeting the needs of the user.
[0062] In a specific example, the control signal voltage is proportional to the electric field strength formed between the pixel electrode and the common electrode, that is, when the control signal is a large voltage signal, the controller provides different voltage signals to the pixel electrode and the common electrode respectively, so that the electric field formed between the pixel electrode and the common electrode is stronger; when the control signal is a small voltage signal, the controller provides different voltage signals to the pixel electrode and the common electrode respectively, so that the electric field formed between the pixel electrode and the common electrode is weaker.
[0063] In a specific example, the controller is used to receive the electrical signal sent by the light detection layer, and generate a control signal based on the electrical signal and a first mapping relationship table stored in the controller, send the control signal to the driving circuit of the display panel to control the light-emitting layer of the display panel to emit light, and / or send a control signal to the pixel electrodes and common electrodes of the light adjustment layer to control the deflection of the liquid crystal molecules, thereby controlling the amount of light transmitted by the light adjustment layer.
[0064] Furthermore, the first mapping relationship table includes a correspondence between the electrical signal and the driving signal of the driving circuit in the display panel, and a correspondence between the electrical signal and the pixel electrode voltage and the common electrode voltage in the light adjustment layer.
[0065] In another specific example, the controller is used to receive the light intensity and display data sent by the light detection layer, and generate a control signal based on the light intensity and display data and a second mapping relationship table stored in the controller, send the control signal to the driving circuit of the display panel to control the light-emitting layer of the display panel to emit light, and / or send a control signal to the pixel electrodes and common electrodes of the light adjustment layer to control the deflection of the liquid crystal molecules, thereby controlling the amount of light transmittance of the light adjustment layer.
[0066] Furthermore, the second mapping relationship table includes the correspondence between the light intensity and display data and the driving signal of the driving circuit in the display panel, and the correspondence between the light intensity and display data and the pixel electrode voltage and the common electrode voltage in the light adjustment layer.
[0067] It should be noted that those skilled in the art can set the mapping relationship table according to the brightness requirements of the display device in actual applications.
[0068] This example is based on an OLED display panel, with the addition of a unidirectional transmission layer, a light detection layer and a light adjustment layer, which can convert ambient light into outgoing light, assist the device structure in emitting light, and reduce the power consumption of the OLED device. Not only can the OLED active light-emitting display and the reflected light passive display be switched between each other, but the active light-emitting display can be compensated by the reflected light passive display.
[0069] In a specific example, the working principle of the active display mode is as follows: when in a dark environment, that is, when there is no ambient light, the light detection layer cannot detect the intensity of the ambient light reflected by the unidirectional transmission layer, that is, the light intensity is 0, and the light detection layer feeds back the light intensity value of 0 and the display data to the controller, and the controller generates a first control signal and a second control signal according to the mapping relationship table. The controller sends the first control signal to the thin-film field effect transistor in the driving circuit layer of the display panel to drive the light-emitting layer of the display panel to emit light, thereby controlling the light intensity of the display panel; at the same time, the controller sends the second control signal to the pixel electrode and the common electrode of the light adjustment layer, so that the light transmittance of the light adjustment layer reaches the maximum value. In this example, the light transmittance of the light output at the edge of the display surface is increased by setting the light transmittance of the light adjustment layer to the maximum value, thereby improving the display brightness and display effect.
[0070] In a specific example, the working principle of the passive display mode is as follows: when there is ambient light, the light detection layer detects the intensity of the ambient light reflected by the unidirectional transmission layer, and the light detector sends the detected light intensity and display data to the controller. The controller generates a third control signal based on the light intensity, display data and a mapping relationship table. The controller sends the third control signal to the pixel electrode and drive electrode of the light adjustment layer to control the light transmittance of the light adjustment layer.
[0071] Furthermore, in this example, the pixel electrode is designed as an integrated unit and the common electrode is designed independently, or the pixel electrode is designed independently and the common electrode is designed as a whole, so as to achieve light in some pixels and no light in some pixels and different brightness of each pixel, and display in passive color by cooperating with the color filter layer.
[0072] In a specific example, the working principle of active and passive collaborative display is as follows: when there is ambient light, the light detection layer detects the intensity of the ambient light reflected by the unidirectional transmission layer, and the light detector sends the detected light intensity and display data to the controller. The controller generates a fourth control signal and a fifth control signal according to the light intensity, display data and a mapping relationship table. The controller sends the fourth control signal to the thin-film field effect transistor in the driving circuit layer of the display panel to drive the light-emitting layer of the display panel to emit light, thereby controlling the light intensity of the display panel; at the same time, the controller sends the fifth control signal to the pixel electrode and common electrode of the light regulator to control the light transmittance of the light regulating layer.
[0073] Furthermore, in this example, when the target light intensity included in the display data is met, the light intensity of the light output from the display panel is adjusted as low as possible, and the light transmittance of the light adjustment layer is increased, so as to achieve the purpose of reducing the energy consumption of the display device.
[0074] In addition, when the intensity of ambient light detected by the unidirectional transmission layer exceeds the target intensity, it is necessary to control the corresponding sub-pixel not to emit light and control the corresponding light adjustment layer to reduce the reflected intensity of the ambient light. At this time, the light transmittance of the light adjustment layer can be reduced.
[0075] The display device provided in this example utilizes ambient light as a passive light source and cooperates with the active light source to emit light, thereby achieving high brightness while maintaining low energy consumption; by reflecting ambient light and coordinating with the EML to actively emit light, active and passive collaborative display is achieved to reduce the power consumption of OLED devices.
[0076] In a specific example, the three display modes of active display, passive display and active-passive coordinated display can be freely switched by combining automatic and manual methods.
[0077] Furthermore, the above active display mode is passively enabled. When there is no ambient light, only the active display mode can be used. At this time, the controller controls the transmittance of the light adjustment layer to be the maximum value. When there is ambient light, it can be set to use the active and passive collaborative display mode by default; the specific selection of the active and passive collaborative display mode or the passive display mode can be switched manually, that is, the display device can also include a switching button, and the controller switches between the active and passive collaborative display mode and the passive display mode in response to the user pressing the switching button.
[0078] Furthermore, if in the active and passive collaborative display mode, the controller determines that there is no ambient light when it determines that the light intensity detected by the light detection layer is similar to or even equal to the light intensity emitted by the display panel, and starts the active display mode; if in the passive display mode, the controller determines that the light intensity detected by the light detection layer disappears, and starts the active display module.
[0079] In combination with the above examples, the three display modes of active display, passive display and active-passive coordinated display can be converted in a fully automatic manner.
[0080] Furthermore, a first preset value and a second preset value are stored in the controller. The controller is configured to compare the light intensity detected by the light detection layer with the first preset value and the second preset value, and when the light intensity is less than or equal to the first preset value, the controller sends a first control signal and a second control signal; when the light intensity is greater than or equal to the preset value, the controller sends a third control signal; when the light intensity is greater than the first preset value and less than the second preset value, the controller sends a fourth control signal and a fifth control signal.
[0081] Furthermore, when the light intensity detected by the light detection layer is less than or equal to a first preset value, the controller generates a first control signal and a second control signal according to the mapping relationship table, and the controller sends the first control signal to the thin-film field effect transistor in the driving circuit layer of the display panel to drive the light-emitting layer of the display panel to emit light, thereby controlling the light intensity of the display panel; at the same time, the controller sends the second control signal to the pixel electrode and the common electrode of the light adjustment layer, so that the light transmittance of the light adjustment layer reaches a maximum value. In this example, by setting the light transmittance of the light adjustment layer to a maximum value, the light transmittance of the light output at the edge of the display surface is increased, thereby improving the display brightness and display effect.
[0082] Furthermore, when the light intensity detected by the light detection layer is greater than or equal to a second preset value, the controller generates a third control signal based on the light intensity, display data and a mapping relationship table, and the controller sends the third control signal to the pixel electrode and driving electrode of the light adjustment layer to control the light transmittance of the light adjustment layer.
[0083] Furthermore, when the light intensity detected by the light detection layer is greater than the first preset value and less than the second preset value, the controller generates a fourth control signal and a fifth control signal based on the light intensity, display data and a mapping relationship table, and the controller sends the fourth control signal to the thin-film field effect transistor in the driving circuit layer of the display panel to drive the light-emitting layer of the display panel to emit light, thereby controlling the light intensity of the display panel; at the same time, the controller sends the fifth control signal to the pixel electrode and common electrode of the light adjuster to control the light transmittance of the light adjustment layer.
[0084] This example improves the flexibility of display mode switching by automatically converting among the three display modes, while achieving high-brightness display and reducing energy consumption.
[0085] It should be noted that those skilled in the art can set the preset value according to the brightness requirement of the display device in actual applications.
[0086] In one possible implementation, the display panel includes a plurality of sub-pixels arranged in an array, and the display device further includes a color filter layer located on a side of the light regulation layer away from the display panel, the color filter layer includes a plurality of filter layers arranged in an array, and the filter layer has an orthographic projection on the display panel located within the sub-pixel.
[0087] In this example, the high-brightness ambient light is used as a passive light source through passive display, and the unfavorable high-brightness environment is converted into a favorable usable light source, thereby reducing or even not using the active light emission of OLED to achieve the same display effect. The ambient light is reflected by the one-way transmission layer and then passes through the light adjustment layer. The filling material of the light adjustment layer controls the intensity of the light emission and whether it emits light, and then controls the RGB color of the light through the filter layer. In this way, the ambient light is converted into a controllable light-emitting structure. The actively emitting OLED device structure can compensate according to the required light intensity, thereby greatly reducing the active light intensity of OLED and reducing the power consumption of the OLED device running in a high-brightness environment.
[0088] In a possible implementation, the display panel includes a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels arranged in an array, the color film layer includes a plurality of first filter layers, a plurality of second filter layers, and a plurality of third filter layers arranged in an array, the orthographic projection of the first filter layer on the display panel is located within the first sub-pixel, the orthographic projection of the second filter layer on the display panel is located within the second sub-pixel, and the orthographic projection of the third filter layer on the display panel is located within the third sub-pixel.
[0089] In a specific example, Figure 1 As shown, the color filter layer 500 includes a plurality of first filter layers 501, a plurality of second filter layers 502 and a plurality of third filter layers 503 arranged in an array;
[0090] Furthermore, the orthographic projection of the first filter layer 501 on the display panel 100 is located in the first sub-pixel 107 , the orthographic projection of the second filter layer 502 on the display panel 100 is located in the second sub-pixel 108 , and the orthographic projection of the third filter layer 503 on the display panel 100 is located in the third sub-pixel 109 .
[0091] This example can achieve individual control of each pixel through the corresponding setting of the filter layer and the sub-pixel, and improve the control accuracy through pixel-level control.
[0092] In a possible implementation manner, the color filter layer further includes a black matrix layer located between adjacent filter layers.
[0093] In a specific example, Figure 1 As shown, the color filter layer 500 further includes a black matrix layer 504 located between adjacent filter layers.
[0094] Furthermore, the filter layer is divided into three regions of R / G / B; between each region is a black light-shielding region, namely a black matrix layer.
[0095] The filter layer in this example can not only improve the color accuracy of the active light-emitting area, but also form a complete emitting light-emitting device with the passive light-emitting area below.
[0096] In a possible implementation manner, an orthographic projection of the one-way transmission layer on the display panel coincides with the display panel.
[0097] In a specific example, when the display screen is a full screen, the orthographic projection of the one-way transmission layer on the display area coincides with the display area.
[0098] In another specific example, when the display screen is not a full screen, for example, the display panel includes a display area and a non-display area, the orthographic projection of the one-way transmission layer on the display area coincides with the display area.
[0099] In this example, by arranging the one-way transmission layer corresponding to the display area, the one-way transmission layer can reflect external light and transmit the light emitted by the display panel.
[0100] In a possible implementation, the orthographic projection of the light detection layer on the display panel coincides with the orthographic projection of the one-way transmission layer on the display panel.
[0101] In a specific example, the light detection layer may also be partially disposed on the side of the one-way transmission layer corresponding to the sub-pixel unit away from the display panel, that is, the orthographic projection of the light detection layer on the display panel coincides with the orthographic projection of the sub-pixel on the display panel.
[0102] In this example, by setting a partial light detection layer on the one-way transmission layer corresponding to the sub-pixel unit, the requirements of the one-way transmission layer can be reduced and the implementation method is simpler.
[0103] In a specific example, when the display screen is a full screen, the orthographic projection of the light detection layer on the display panel coincides with the orthographic projection of the one-way transmission layer on the display panel.
[0104] In another specific example, when the display screen is not a full screen, for example, the display panel includes a display area and a non-display area, the orthographic projection of the light detection layer on the display area coincides with the orthographic projection of the one-way transmission layer on the display area.
[0105] In this example, relative to the coincidence of the orthographic projection of the light detection layer on the display panel and the orthographic projection of the sub-pixel on the display panel, the light detection layer will not lose a part of the ambient light. This is because when the front side of the light detection layer is set on the one-way transmission layer, relative to when the light detection layer is partially set on the area corresponding to the one-way transmission layer and the sub-pixel, the ambient light reflected by the one-way transmission layer at various angles can be detected, and the ambient light at a specific angle will not be lost. Therefore, relative to when the light detection layer is partially set on the area corresponding to the one-way transmission layer and the sub-pixel, the use of active light emission can be reduced in this example.
[0106] In a possible implementation manner, an orthographic projection of the light regulation layer on the display panel coincides with an orthographic projection of the one-way transmission layer on the display panel.
[0107] In a specific example, when the display screen is a full screen, the orthographic projection of the light adjustment layer on the display panel coincides with the orthographic projection of the one-way transmission layer on the display panel.
[0108] In another specific example, when the display screen is not a full screen, for example, the display panel includes a display area and a non-display area, the orthographic projection of the light adjustment layer on the display area coincides with the orthographic projection of the one-way transmission layer on the display area.
[0109] In this example, by setting the light adjustment layer and the one-way transmission layer correspondingly, the light adjustment layer can adjust its light transmittance according to the external light intensity, and can individually adjust the transmittance of the light adjustment layer corresponding to each sub-pixel area.
[0110] In a possible implementation manner, the display panel is an organic electroluminescent display panel.
[0111] In another possible implementation, the display panel is a liquid crystal display (LCD) display panel.
[0112] Furthermore, when the display panel is a liquid crystal display panel and the light adjustment layer is a liquid crystal layer, the light adjustment layer can be reused as the liquid crystal layer in the liquid crystal display panel, and the filter layer in the display device can be reused as the color filter substrate in the liquid crystal display panel.
[0113] This example can effectively reduce the overall thickness of the display device while achieving high-brightness display and reducing the energy consumption of the display device.
[0114] Alternatively, when the display panel is a liquid crystal display panel and the light adjustment layer is a liquid crystal layer, a unidirectional transmission layer and a light detection layer may be sequentially disposed between the liquid crystal layer of the display panel and the liquid crystal layer of the light adjustment layer.
[0115] In addition, the display panel can also be a micro light emitting diode (Micro Light Emitting Diode, Micro-LED) display panel; or a submillimeter light emitting diode (Mini Light Emitting Diode, Mini-LED) display panel; or a quantum dot light emitting diode (Quantum Dot Light Emitting Diodes, QLED) display panel.
[0116] In this embodiment, the selectable active and passive collaborative display mode and passive display mode have significant low power consumption technical advantages and can greatly improve the service life of display devices such as OLED devices.
[0117] In a specific example, the display device may be any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, etc., which is not limited in this embodiment.
[0118] Another embodiment of the present disclosure provides a display method based on the display device, including the display panel emitting display light, and the controller controlling the light intensity of the display panel and the light transmittance of the light adjustment layer according to the light intensity and display data detected by the light detection layer; or the display panel does not emit display light, and the controller controls the light transmittance of the light adjustment layer according to the light intensity and display data detected by the light detection layer.
[0119] In a specific example, the working principle of the active display mode is as follows: when in a dark environment, that is, when there is no ambient light, the light detection layer cannot detect the intensity of the ambient light reflected by the unidirectional transmission layer, that is, the light intensity is 0, and the light detection layer feeds back the light intensity value of 0 and the display data to the controller, and the controller generates a first control signal and a second control signal according to the mapping relationship table. The controller sends the first control signal to the thin-film field effect transistor in the driving circuit layer of the display panel to drive the light-emitting layer of the display panel to emit light, thereby controlling the light intensity of the display panel; at the same time, the controller sends the second control signal to the pixel electrode and the common electrode of the light adjustment layer, so that the light transmittance of the light adjustment layer reaches the maximum value. In this example, the light transmittance of the light output at the edge of the display surface is increased by setting the light transmittance of the light adjustment layer to the maximum value, thereby improving the display brightness and display effect.
[0120] In a specific example, the working principle of the passive display mode is as follows: when there is ambient light, the light detection layer detects the intensity of the ambient light reflected by the unidirectional transmission layer, and the light detector sends the detected light intensity and display data to the controller. The controller generates a third control signal based on the light intensity, display data and a mapping relationship table. The controller sends the third control signal to the pixel electrode and drive electrode of the light adjustment layer to control the light transmittance of the light adjustment layer.
[0121] Furthermore, in this example, the pixel electrode is designed as an integrated unit and the common electrode is designed independently, or the pixel electrode is designed independently and the common electrode is designed as a whole, so as to achieve light in some pixels and no light in some pixels and different brightness of each pixel, and display in passive color by cooperating with the color filter layer.
[0122] In a specific example, the working principle of active and passive collaborative display is as follows: when there is ambient light, the light detection layer detects the intensity of the ambient light reflected by the unidirectional transmission layer, and the light detector sends the detected light intensity and display data to the controller. The controller generates a fourth control signal and a fifth control signal according to the light intensity, display data and a mapping relationship table. The controller sends the fourth control signal to the thin-film field effect transistor in the driving circuit layer of the display panel to drive the light-emitting layer of the display panel to emit light, thereby controlling the light intensity of the display panel; at the same time, the controller sends the fifth control signal to the pixel electrode and common electrode of the light regulator to control the light transmittance of the light regulating layer.
[0123] Furthermore, in this example, when the target light intensity included in the display data is met, the light intensity of the light output from the display panel is adjusted as low as possible, and the light transmittance of the light adjustment layer is increased, so as to achieve the purpose of reducing the energy consumption of the display device.
[0124] In addition, when the intensity of ambient light detected by the unidirectional transmission layer exceeds the target intensity, it is necessary to control the corresponding sub-pixel not to emit light and control the corresponding light adjustment layer to reduce the reflected intensity of the ambient light. At this time, the light transmittance of the light adjustment layer can be reduced.
[0125] The display device provided in this example utilizes ambient light as a passive light source and cooperates with the active light source to emit light, thereby achieving high brightness while maintaining low energy consumption; by reflecting ambient light and coordinating with the EML to actively emit light, active and passive collaborative display is achieved to reduce the power consumption of OLED devices.
[0126] In a specific example, the three display modes of active display, passive display and active-passive coordinated display can be freely switched by combining automatic and manual methods.
[0127] Furthermore, the above active display mode is passively enabled. When there is no ambient light, only the active display mode can be used. At this time, the controller controls the transmittance of the light adjustment layer to be the maximum value. When there is ambient light, it can be set to use the active and passive collaborative display mode by default; the specific selection of the active and passive collaborative display mode or the passive display mode can be switched manually, that is, the display device can also include a switching button, and the controller switches between the active and passive collaborative display mode and the passive display mode in response to the user pressing the switching button.
[0128] Furthermore, if in the active and passive collaborative display mode, the controller determines that there is no ambient light when it determines that the light intensity detected by the light detection layer is similar to or even equal to the light intensity emitted by the display panel, and starts the active display mode; if in the passive display mode, the controller determines that the light intensity detected by the light detection layer disappears, and starts the active display module.
[0129] In combination with the above examples, the three display modes of active display, passive display and active-passive coordinated display can be converted in a fully automatic manner.
[0130] Furthermore, a first preset value and a second preset value are stored in the controller. The controller is configured to compare the light intensity detected by the light detection layer with the first preset value and the second preset value, and when the light intensity is less than or equal to the first preset value, the controller sends a first control signal and a second control signal; when the light intensity is greater than or equal to the preset value, the controller sends a third control signal; when the light intensity is greater than the first preset value and less than the second preset value, the controller sends a fourth control signal and a fifth control signal.
[0131] Furthermore, when the light intensity detected by the light detection layer is less than or equal to a first preset value, the controller generates a first control signal and a second control signal according to the mapping relationship table, and the controller sends the first control signal to the thin-film field effect transistor in the driving circuit layer of the display panel to drive the light-emitting layer of the display panel to emit light, thereby controlling the light intensity of the display panel; at the same time, the controller sends the second control signal to the pixel electrode and the common electrode of the light adjustment layer, so that the light transmittance of the light adjustment layer reaches a maximum value. In this example, by setting the light transmittance of the light adjustment layer to a maximum value, the light transmittance of the light output at the edge of the display surface is increased, thereby improving the display brightness and display effect.
[0132] Furthermore, when the light intensity detected by the light detection layer is greater than or equal to a second preset value, the controller generates a third control signal based on the light intensity, display data and a mapping relationship table, and the controller sends the third control signal to the pixel electrode and driving electrode of the light adjustment layer to control the light transmittance of the light adjustment layer.
[0133] Furthermore, when the light intensity detected by the light detection layer is greater than the first preset value and less than the second preset value, the controller generates a fourth control signal and a fifth control signal based on the light intensity, display data and a mapping relationship table, and the controller sends the fourth control signal to the thin-film field effect transistor in the driving circuit layer of the display panel to drive the light-emitting layer of the display panel to emit light, thereby controlling the light intensity of the display panel; at the same time, the controller sends the fifth control signal to the pixel electrode and common electrode of the light adjuster to control the light transmittance of the light adjustment layer.
[0134] This example improves the flexibility of display mode switching by automatically converting among the three display modes, while achieving high-brightness display and reducing energy consumption.
[0135] It should be noted that those skilled in the art can set the preset value according to the brightness requirement of the display device in actual applications.
[0136] This embodiment can realize active and passive collaborative display, and can also realize active display or passive display by setting a one-way transmission layer, a light detection layer and a light adjustment layer on the light-emitting side of the display panel. When there is no ambient light, active display can be performed; when there is ambient light, passive display can be performed, or active and passive collaborative display can be performed, so as to reduce the energy consumption of the display device while meeting the brightness target. At the same time, the display brightness of the display device is made more uniform, which improves the display effect of the display device.
[0137] Obviously, the above embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure, and are not limitations on the implementation methods of the present disclosure. For ordinary technicians in this field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present disclosure are still within the protection scope of the present disclosure.
Claims
1. A display device, characterized in that: It includes a display panel, and a one-way transmission layer, a light detection layer and a light adjustment layer which are sequentially stacked on the light-emitting side of the display panel, and also includes a controller; The one-way transmission layer is used to transmit incident light close to the display panel and reflect incident light away from the display panel; The controller is used to control the light intensity of the display panel and / or the light transmittance of the light adjustment layer according to the light intensity and display data detected by the light detection layer.
2. The display device according to claim 1, characterized in that The display panel includes a plurality of sub-pixels arranged in an array, and the display device also includes a color filter layer located on a side of the light regulation layer away from the display panel, the color filter layer includes a plurality of filter layers arranged in an array, and the orthographic projection of the filter layer on the display panel is located within the sub-pixel.
3. The display device according to claim 2, characterized in that: The display panel includes a plurality of first sub-pixels, a plurality of second sub-pixels, and a plurality of third sub-pixels arranged in an array, the color film layer includes a plurality of first filter layers, a plurality of second filter layers, and a plurality of third filter layers arranged in an array, the orthographic projection of the first filter layer on the display panel is located within the first sub-pixel, the orthographic projection of the second filter layer on the display panel is located within the second sub-pixel, and the orthographic projection of the third filter layer on the display panel is located within the third sub-pixel.
4. The display device according to claim 3, characterized in that: The color filter layer also includes a black matrix layer located between adjacent filter layers.
5. The display device according to claim 1, characterized in that The light adjustment layer includes a liquid crystal layer.
6. The display device according to claim 1, characterized in that: The orthographic projection of the one-way transmission layer on the display panel coincides with the display panel.
7. The display device according to claim 1, characterized in that The orthographic projection of the light detection layer on the display panel coincides with the orthographic projection of the one-way transmission layer on the display panel.
8. The display device according to claim 1, characterized in that: The orthographic projection of the light regulating layer on the display panel coincides with the orthographic projection of the one-way transmission layer on the display panel.
9. The display device according to claim 1, characterized in that: The display panel is an organic electroluminescent display panel.
10. A display method based on the display device according to any one of claims 1 to 9, characterized in that: The display panel emits display light, and the controller controls the light intensity of the display panel and the light transmittance of the light adjustment layer according to the light intensity and display data detected by the light detection layer; or the display panel does not emit display light, and the controller controls the light transmittance of the light adjustment layer according to the light intensity and display data detected by the light detection layer.