Why Is the Brightness Control Asymmetrical?

[JWhy]

hi

In HD Graphics Control Panel > Color > Basic > All Colors > Brightness:

When you change brightness, the colors are not changed equally-- the tint of my LCD screen changes. As i turn down the brightness, the screen becomes bluish. You can see the asymmetry in the Sample 1 Preview:

Why?

Is it possible to turn down the brightness on all colors equally?

Here are my display stats:

Intel(R) HD Graphics

Report Date: Friday, February 5, 2016

Report Time [hh:mm:ss]: 8:21:35 AM

Driver Version: 10.18.10.4276

Operating System: Windows* 10 Pro Insider Preview (10.0.10586)

Default Language: English (United States)

Installed DirectX* Version: 12.0

Supported DirectX* Version: 11.0

Shader Version: 5.0

OpenGL* Version: 4.0

OpenCL* Version: 1.2

Physical Memory: 1939 MB

Processor: Intel(R) Celeron(R) CPU N2840 @ 2.16GHz

Processor Speed: 2167 MHz

Vendor ID: 8086

Device ID: 0F31

Device Revision: 0E

* Processor Graphics Information *

Processor Graphics in Use: Intel(R) HD Graphics

Video BIOS: 1014.0

Current Resolution: 1366 x 768

* Devices connected to the Graphics Accelerator *

Active Displays: 1

* Built-in Display *

Display Type: Digital

Serial Number: SEC3859

DDC2 Protocol: Supported

Gamma: 2.2

Connector Type: Embedded DisplayPort

Device Type: Built-in Display

Maximum Image Size

Horizontal Size: 11.42 inches

Vertical Size: 6.3 inches

Supported Modes

1366 x 768 (60p Hz)

1366 x 768 (40p Hz)

Raw EDID:

00 FF FF FF FF FF FF 00 4C A3 59 38 00 00 00 00

00 16 01 04 90 1D 10 78 0A 87 F5 94 57 4F 8C 27

27 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01

01 01 01 01 01 01 CE 1D 56 F0 50 00 18 30 40 30

25 00 25 A5 10 00 00 19 D8 13 56 F0 50 00 18 30

40 30 25 00 25 A5 10 00 00 19 00 00 00 00 00 00

00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 02

00 0C 42 F2 0C 4C 64 15 10 1B 69 00 00 00 00 9F

* Other names and brands are the property of their respective owners.

thx!

[Anonymous]

Hi Johny Why,

I noted you have an Intel® Celeron™ N2840 with Intel® HD Graphics. The support for Windows® 10 is limited. The drivers are going to be distributed by Windows® 10 update only.

If you are getting issues with the brightness, I suggest you to uninstall and delete the current driver from device manager, restart the NUC and run Windows® 10 update.

In regards your question, "Why Is the Brightness Control Asymmetrical? " I am going to escalate it with our graphics engineer. I will try to get an answer soon.

Regards,

Mike C

[Anonymous]

Hi Johny Why,

The Brightness Control can work in both "Symmetrical" and "Asymmetrical" ways.

The key here is the following control:

Under "Color Enhancement", by default "All Colors" is selected.

If you move the controls below, specifically the Brightness, the change will be done "Symmetrical" to all the colors. Note that the "Preview" example to the right should be a straight line.

However, if instead of using "All colors" you select either Red, Green or Blue, and then change the Brightness, the change will be done "Asymmetrical".

Please let me know if this answers your question.

Regards,

Mike C